The Antiproton Decelerator (AD) at CERN provides antiproton bunches with a kinetic energy of 5.3 ... more The Antiproton Decelerator (AD) at CERN provides antiproton bunches with a kinetic energy of 5.3 MeV. The Extra-Low ENergy Antiproton ring at CERN, commissioned at the AD in 2018, now supplies a bunch of electroncooled antiprotons at a fixed energy of 100 keV. The MUSASHI antiproton trap was upgraded by replacing the radio-frequency quadrupole decelerator with a pulsed drift tube to re-accelerate antiprotons and optimize the injection energy into the degrader foils. By increasing the beam energy to 119 keV, a cooled antiproton accumulation efficiency of (26 ± 6)% was achieved.
Methods for reducing the radius, temperature and space charge of a non-neutral plasma are usually... more Methods for reducing the radius, temperature and space charge of a non-neutral plasma are usually reported for conditions which approximate an ideal Penning Malmberg trap. Here, we show that (i) similar methods are still effective under surprisingly adverse circumstances: we perform strong drive regime (SDR) compression and SDREVC in a strong magnetic mirror field using only 3 out of 4 rotating wall petals. In addition, we demonstrate (ii) an alternative to SDREVC, using e-kick instead of evaporative cooling (EVC) and (iii) an upper limit for how much plasma can be cooled to $T<20\ \mathrm {K}$ using EVC. This limit depends on the space charge, not on the number of particles or the plasma density.
This is a status report on the progress of the ASACUSA collaboration during 2020 and a report of ... more This is a status report on the progress of the ASACUSA collaboration during 2020 and a report of plans for 202
Magnetized nonneutral plasma composed of electrons or positrons couples to the local microwave en... more Magnetized nonneutral plasma composed of electrons or positrons couples to the local microwave environment via cyclotron radiation. The equilibrium plasma temperature depends on the microwave energy density near the cyclotron frequency. Fine copper meshes and cryogenic microwave absorbing material were used to lower the effective temperature of the radiation environment in ASACUSA's Cusp trap, resulting in significantly reduced plasma temperature.
The UKRI funded Robotics and Artificial Intelligence in Nuclear (RAIN) Hub objective is to perfor... more The UKRI funded Robotics and Artificial Intelligence in Nuclear (RAIN) Hub objective is to perform R&amp;D to create intelligent robots that can operate in nuclear environments. The radiation environment damages sensors, cables and mechanical systems, and micro-controllers and microprocessors. It is important to identify key components and find Commercial Off-The-Shelf (COTS) solutions that enable robots to work for sufficient periods in nuclear radiation environments. This is especially important for nuclear decommissioning. As a first case study, the radiation tolerance of a COTS LiDAR system has been evaluated. Laser light detection and ranging (LiDAR) systems are widely used in robotics to build up an image of the environment in which the robot is operating. The LiDAR module tested was the STMicroelectronics VL53L0X, a new generation Time-of-Flight (ToF) laser-ranging module housed in a very small package. The package includes a 940 nm VCSEL (Vertical Cavity Surface-Emitting Laser) laser, SPAD (Single Photon Avalanche Diode) array, on-board memory and microcontroller. Beta (Strontium-90) and gamma (Cobalt-60) sources were used to evaluate the LiDAR for Single Event Upset and Total Ionizing Dose Effects. This complicated but inexpensive system was found to show no degradation in performance up to the maximum ionising dose achieved of 5800 Gray. This is more than adequate for nuclear decommissioning applications.
C. Amslera, D. Barnab, H. Breukerc, M. Bumbara, S. Chesnevskayaa, G. Costantinid, R. Ferragute, M... more C. Amslera, D. Barnab, H. Breukerc, M. Bumbara, S. Chesnevskayaa, G. Costantinid, R. Ferragute, M. Giammarchif , A. Gligorovaa, G. Gostad, H. Higakig, M. Horih,i∗, E. D. Huntera, Y. Kanaij , C. Killiana, V. Kletzla, V. Kraxbergera, N. Kurodak, A. Lanza, M. Lealid, V. Mäckela,c, G. Maerol, C. Malbrunotm, V. Mascagnad, Y. Matsudak, S. Miglioratid, D. J. Murtagha, Y. Nagatan, A. Nandaa, L. Nowakm, F. Parnefjord Gustafssona, E. Pasinol, W. Pirklh, M. Romél, M. C. Simona, M. Tajimaj , V. Tosoe, U. Uggerhøjo, S. Ulmerc, L. Venturellid, A. Weisera, E. Widmanna∗, T. Wolzm, Y. Yamazakic, J. Zmeskala
Magnetized nonneutral plasma composed of electrons or positrons couples to the local microwave en... more Magnetized nonneutral plasma composed of electrons or positrons couples to the local microwave environment via cyclotron radiation. The equilibrium plasma temperature depends on the microwave energy density near the cyclotron frequency. Fine copper meshes and cryogenic microwave absorbing material were used to lower the effective temperature of the radiation environment in ASACUSA’s Cusp trap, resulting in significantly reduced plasma temperature.
The ASACUSA collaboration produces a beam of antihydrogen atoms by mixing pure positron and antip... more The ASACUSA collaboration produces a beam of antihydrogen atoms by mixing pure positron and antiproton plasmas in a strong magnetic field with a double cusp geometry. The positrons cool via cyclotron radiation inside the cryogenic trap. Low positron temperature is essential for increasing the fraction of antihydrogen atoms which reach the ground state prior to exiting the trap. Many experimental groups observe that such plasmas reach equilibrium at a temperature well above the temperature of the surrounding electrodes. This problem is typically attributed to electronic noise and plasma expansion, which heat the plasma. The present work reports anomalous heating far beyond what can be attributed to those two sources. The heating seems to be a result of the axially open trap geometry, which couples the plasma to the external (300 K) environment via microwave radiation.
The PANDA experiment at FAIR in Darmstadt will use proton-antiproton collisions, with momenta ran... more The PANDA experiment at FAIR in Darmstadt will use proton-antiproton collisions, with momenta ranging from 1.5 GeV/c to 15 GeV/c, on a fixed target to study open questions in hadron physics. The Barrel Time-of-Flight detector for this experiment is a scintillating tile hodoscope based on 16 identical and independent subdetectors called Super-Modules arranged in a cylindrical configuration. We have conducted performance studies on one such Super-Module to prove the feasibility of the Barrel Time-of-Flight detector design. Time resolution, signal delay and amplitude drop along the length of the detector were measured and analyzed as a function of the position on the individual scintillator tiles. A time resolution of about 50 ps has been achieved, which is very important for event timing and particle identification.
The astrophysical p-process is an important way of nucleosynthesis to produce the stable and prot... more The astrophysical p-process is an important way of nucleosynthesis to produce the stable and proton-rich nuclei beyond Fe which can not be reached by the s- and r-processes. In the present study, the impact of nuclear ingredients, especially the nuclear potential, level density and strength function, to the astrophysical re-action rates of (p,γ), (α,γ), (γ,p), and (γ,α) reactions are systematically studied. The calculations are performed basad on the modern reaction code TALYS for about 3000 stable and proton-rich nuclei with 12≤Z≤110. In particular, both of the Wood-Saxon potential and the microscopic folding potential are taken into account. It is found that both the capture and photonuclear reaction rates are very sensitive to the nuclear potential, thus the better determination of nuclear potential would be important to reduce the uncertainties of reaction rates. Meanwhile, the Extreme Light Infrastructure-Nuclear Physics (ELI-NP) facility is being developed, which will provide ...
The Extreme Light Infrastructure-Nuclear Physics (ELI-NP) facility, under construction in Magurel... more The Extreme Light Infrastructure-Nuclear Physics (ELI-NP) facility, under construction in Magurele near Bucharest in Romania, will provide high-intensity and high-resolution gamma ray beams that can be used to address hotly debated problems in nuclear astrophysics. For this purpose, a silicon strip detector array (named ELISSA) will be realized in a common effort by ELI-NP and Laboratori Nazionali del Sud (INFN-LNS), in order to measure excitation functions and angular distributions over a wide energy and angular range. An experimental campaign is ongoing in order to test the feasibility of the future study at ELI-NP. With this aim, an experiment has been approved at INFN-LNS in order to measure the \(^{19}\)F(p,\(\alpha _{\pi }\))\(^{16}\)O reaction at astrophysical energies using a prototype of the ELISSA array. Moreover, an exploratory experiment to measure the \(^{7}\)Li(\(\gamma \),\(^{3}\)H)\(^{4}\)He reaction has been performed at High Intensity Gamma Source (HI\(\gamma \)S)....
The Antiproton Decelerator (AD) at CERN provides antiproton bunches with a kinetic energy of 5.3 ... more The Antiproton Decelerator (AD) at CERN provides antiproton bunches with a kinetic energy of 5.3 MeV. The Extra-Low ENergy Antiproton ring at CERN, commissioned at the AD in 2018, now supplies a bunch of electroncooled antiprotons at a fixed energy of 100 keV. The MUSASHI antiproton trap was upgraded by replacing the radio-frequency quadrupole decelerator with a pulsed drift tube to re-accelerate antiprotons and optimize the injection energy into the degrader foils. By increasing the beam energy to 119 keV, a cooled antiproton accumulation efficiency of (26 ± 6)% was achieved.
Methods for reducing the radius, temperature and space charge of a non-neutral plasma are usually... more Methods for reducing the radius, temperature and space charge of a non-neutral plasma are usually reported for conditions which approximate an ideal Penning Malmberg trap. Here, we show that (i) similar methods are still effective under surprisingly adverse circumstances: we perform strong drive regime (SDR) compression and SDREVC in a strong magnetic mirror field using only 3 out of 4 rotating wall petals. In addition, we demonstrate (ii) an alternative to SDREVC, using e-kick instead of evaporative cooling (EVC) and (iii) an upper limit for how much plasma can be cooled to $T<20\ \mathrm {K}$ using EVC. This limit depends on the space charge, not on the number of particles or the plasma density.
This is a status report on the progress of the ASACUSA collaboration during 2020 and a report of ... more This is a status report on the progress of the ASACUSA collaboration during 2020 and a report of plans for 202
Magnetized nonneutral plasma composed of electrons or positrons couples to the local microwave en... more Magnetized nonneutral plasma composed of electrons or positrons couples to the local microwave environment via cyclotron radiation. The equilibrium plasma temperature depends on the microwave energy density near the cyclotron frequency. Fine copper meshes and cryogenic microwave absorbing material were used to lower the effective temperature of the radiation environment in ASACUSA's Cusp trap, resulting in significantly reduced plasma temperature.
The UKRI funded Robotics and Artificial Intelligence in Nuclear (RAIN) Hub objective is to perfor... more The UKRI funded Robotics and Artificial Intelligence in Nuclear (RAIN) Hub objective is to perform R&amp;D to create intelligent robots that can operate in nuclear environments. The radiation environment damages sensors, cables and mechanical systems, and micro-controllers and microprocessors. It is important to identify key components and find Commercial Off-The-Shelf (COTS) solutions that enable robots to work for sufficient periods in nuclear radiation environments. This is especially important for nuclear decommissioning. As a first case study, the radiation tolerance of a COTS LiDAR system has been evaluated. Laser light detection and ranging (LiDAR) systems are widely used in robotics to build up an image of the environment in which the robot is operating. The LiDAR module tested was the STMicroelectronics VL53L0X, a new generation Time-of-Flight (ToF) laser-ranging module housed in a very small package. The package includes a 940 nm VCSEL (Vertical Cavity Surface-Emitting Laser) laser, SPAD (Single Photon Avalanche Diode) array, on-board memory and microcontroller. Beta (Strontium-90) and gamma (Cobalt-60) sources were used to evaluate the LiDAR for Single Event Upset and Total Ionizing Dose Effects. This complicated but inexpensive system was found to show no degradation in performance up to the maximum ionising dose achieved of 5800 Gray. This is more than adequate for nuclear decommissioning applications.
C. Amslera, D. Barnab, H. Breukerc, M. Bumbara, S. Chesnevskayaa, G. Costantinid, R. Ferragute, M... more C. Amslera, D. Barnab, H. Breukerc, M. Bumbara, S. Chesnevskayaa, G. Costantinid, R. Ferragute, M. Giammarchif , A. Gligorovaa, G. Gostad, H. Higakig, M. Horih,i∗, E. D. Huntera, Y. Kanaij , C. Killiana, V. Kletzla, V. Kraxbergera, N. Kurodak, A. Lanza, M. Lealid, V. Mäckela,c, G. Maerol, C. Malbrunotm, V. Mascagnad, Y. Matsudak, S. Miglioratid, D. J. Murtagha, Y. Nagatan, A. Nandaa, L. Nowakm, F. Parnefjord Gustafssona, E. Pasinol, W. Pirklh, M. Romél, M. C. Simona, M. Tajimaj , V. Tosoe, U. Uggerhøjo, S. Ulmerc, L. Venturellid, A. Weisera, E. Widmanna∗, T. Wolzm, Y. Yamazakic, J. Zmeskala
Magnetized nonneutral plasma composed of electrons or positrons couples to the local microwave en... more Magnetized nonneutral plasma composed of electrons or positrons couples to the local microwave environment via cyclotron radiation. The equilibrium plasma temperature depends on the microwave energy density near the cyclotron frequency. Fine copper meshes and cryogenic microwave absorbing material were used to lower the effective temperature of the radiation environment in ASACUSA’s Cusp trap, resulting in significantly reduced plasma temperature.
The ASACUSA collaboration produces a beam of antihydrogen atoms by mixing pure positron and antip... more The ASACUSA collaboration produces a beam of antihydrogen atoms by mixing pure positron and antiproton plasmas in a strong magnetic field with a double cusp geometry. The positrons cool via cyclotron radiation inside the cryogenic trap. Low positron temperature is essential for increasing the fraction of antihydrogen atoms which reach the ground state prior to exiting the trap. Many experimental groups observe that such plasmas reach equilibrium at a temperature well above the temperature of the surrounding electrodes. This problem is typically attributed to electronic noise and plasma expansion, which heat the plasma. The present work reports anomalous heating far beyond what can be attributed to those two sources. The heating seems to be a result of the axially open trap geometry, which couples the plasma to the external (300 K) environment via microwave radiation.
The PANDA experiment at FAIR in Darmstadt will use proton-antiproton collisions, with momenta ran... more The PANDA experiment at FAIR in Darmstadt will use proton-antiproton collisions, with momenta ranging from 1.5 GeV/c to 15 GeV/c, on a fixed target to study open questions in hadron physics. The Barrel Time-of-Flight detector for this experiment is a scintillating tile hodoscope based on 16 identical and independent subdetectors called Super-Modules arranged in a cylindrical configuration. We have conducted performance studies on one such Super-Module to prove the feasibility of the Barrel Time-of-Flight detector design. Time resolution, signal delay and amplitude drop along the length of the detector were measured and analyzed as a function of the position on the individual scintillator tiles. A time resolution of about 50 ps has been achieved, which is very important for event timing and particle identification.
The astrophysical p-process is an important way of nucleosynthesis to produce the stable and prot... more The astrophysical p-process is an important way of nucleosynthesis to produce the stable and proton-rich nuclei beyond Fe which can not be reached by the s- and r-processes. In the present study, the impact of nuclear ingredients, especially the nuclear potential, level density and strength function, to the astrophysical re-action rates of (p,γ), (α,γ), (γ,p), and (γ,α) reactions are systematically studied. The calculations are performed basad on the modern reaction code TALYS for about 3000 stable and proton-rich nuclei with 12≤Z≤110. In particular, both of the Wood-Saxon potential and the microscopic folding potential are taken into account. It is found that both the capture and photonuclear reaction rates are very sensitive to the nuclear potential, thus the better determination of nuclear potential would be important to reduce the uncertainties of reaction rates. Meanwhile, the Extreme Light Infrastructure-Nuclear Physics (ELI-NP) facility is being developed, which will provide ...
The Extreme Light Infrastructure-Nuclear Physics (ELI-NP) facility, under construction in Magurel... more The Extreme Light Infrastructure-Nuclear Physics (ELI-NP) facility, under construction in Magurele near Bucharest in Romania, will provide high-intensity and high-resolution gamma ray beams that can be used to address hotly debated problems in nuclear astrophysics. For this purpose, a silicon strip detector array (named ELISSA) will be realized in a common effort by ELI-NP and Laboratori Nazionali del Sud (INFN-LNS), in order to measure excitation functions and angular distributions over a wide energy and angular range. An experimental campaign is ongoing in order to test the feasibility of the future study at ELI-NP. With this aim, an experiment has been approved at INFN-LNS in order to measure the \(^{19}\)F(p,\(\alpha _{\pi }\))\(^{16}\)O reaction at astrophysical energies using a prototype of the ELISSA array. Moreover, an exploratory experiment to measure the \(^{7}\)Li(\(\gamma \),\(^{3}\)H)\(^{4}\)He reaction has been performed at High Intensity Gamma Source (HI\(\gamma \)S)....
The astrophysical p-process is an important way of nucleosynthesis to produce the stable and prot... more The astrophysical p-process is an important way of nucleosynthesis to produce the stable and proton-rich nuclei beyond Fe which can not be reached by the s- and r-processes. In the present study, the impact of nuclear ingredients, especially the nuclear potential, level density and strength function, to the astrophysical re-action rates of (p,γ), (α,γ), (γ,p), and (γ,α) reactions are systematically studied. The calculations are performed basad on the modern reaction code TALYS for about 3000 stable and proton-rich nuclei with 12≤Z≤110. In particular, both of the Wood-Saxon potential and the microscopic folding potential are taken into account. It is found that both the capture and photonuclear reaction rates are very sensitive to the nuclear potential, thus the better determination of nuclear potential would be important to reduce the uncertainties of reaction rates. Meanwhile, the Extreme Light Infrastructure-Nuclear Physics (ELI-NP) facility is being developed, which will provide the great opportunity to experimentally study the photonuclear reactions in p-process. Simulations of the experimental setup for the measurements of the photonuclear reactions 96Ru(γ,p) and 96Ru(γ,α) are performed. It is shown that the experiments of photonuclear reactions in p-process based on ELI-NP are quite promising.
The Extreme Light Infrastructure-Nuclear Physics (ELI-NP) facility, under construction in Magurel... more The Extreme Light Infrastructure-Nuclear Physics (ELI-NP) facility, under construction in Magurele near Bucharest in Romania, will provide high-intensity and high-resolution gamma ray beams that can be used to address hotly debated problems in nuclear astrophysics, such as the accurate measurements of the cross sections of the 24 Mg(γ,α) 20 Ne reaction, that is fundamental to determine the effective rate of 28 Si destruction right before the core collapse and the subsequent supernova explosion. For this purpose, a silicon strip detector array (named ELISSA, acronym for Extreme Light Infrastructure Silicon Strip Array) will be realized in a common effort by ELI-NP and Laboratori Nazionali del Sud (INFN-LNS), in order to measure excitation functions and angular distributions over a wide energy and angular range. A prototype of ELISSA was built and tested at INFN-LNS in Catania (Italy) with the support of ELI-NP. In this occasion, we have carried out experiments with alpha sources and with a 11 MeV 7 Li beam. Thanks to our approach, the first results of those tests show up a very good energy resolution (better than 1%) and very good position resolution, of the order of 1 mm. Moreover, a threshold of 150 keV can be easily achieved with no cooling.
Position-sensitive silicon strip detectors represent one of the best solutions for the detection ... more Position-sensitive silicon strip detectors represent one of the best solutions for the detection of charged particles as they provide good energy and position resolution over a large range of energies. A silicon array coupled with the gamma beams at the ELI-NP facility would allow measuring photodissociation reactions of interest for Big Bang Nucleosynthesis and on heavy nuclei intervening in the p-process. Forty X3 detectors for our ELISSA (ELI-NP Silicon Strip Detectors Array) project have been recently purchased and tested. We investigated several specifications, such as leakage currents, depletion voltage, and detector stability under vacuum. The energy and position resolution, and ballistic deficit were measured and analyzed. This paper presents the main results of our extensive testing. The measured energy resolution for the X3 detectors is better than results published for similar arrays (ANASEN or ORRUBA).
Methods for reducing the radius, temperature, and space charge of nonneutral plasma are usually r... more Methods for reducing the radius, temperature, and space charge of nonneutral plasma are usually reported for conditions which approximate an ideal Penning Malmberg trap. Here we show that (1) similar methods are still effective under surprisingly adverse circumstances: we perform SDR and SDREVC in a strong magnetic mirror field using only 3 out of 4 rotating wall petals. In addition, we demonstrate (2) an alternative to SDREVC, using e-kick instead of EVC and (3) an upper limit for how much plasma can be cooled to T < 20 K using EVC. This limit depends on the space charge, not on the number of particles or the plasma density.
The ASACUSA Cusp experiment requires the production of dense positron plasmas
with a high repetit... more The ASACUSA Cusp experiment requires the production of dense positron plasmas with a high repetition rate to produce a beam of antihydrogen. In this work, details of the positron production apparatus used for the first observation of the antihydrogen beam, and subsequent measurements are described in detail. This apparatus replaced the previous compact trap design resulting in an improvement in positron accumulation by a factor of (52 ± 3).
The ASACUSA-Cusp collaboration has recently upgraded the positron system to improve the productio... more The ASACUSA-Cusp collaboration has recently upgraded the positron system to improve the production of antihydrogen. Previously, the experiment suffered from contamination of the vacuum in the antihydrogen production trap due to the transfer of positrons from the high pressure region of a buffer gas trap. This contamination reduced the lifetime of antiprotons. By adding a new positron accumulator and therefore decreasing the number of transfer cycles, the contamination of the vacuum has been reduced. Further to this, a new rare gas moderator and buffer gas trap, previously used at Aarhus University, were installed. Measurements from Aarhus suggested that the number of positrons could increased by a factor of four in comparison to the old system used at CERN. This would mean a reduction of the time needed for accumulating a sufficient number of positrons (of the order of a few million) for an antihydrogen production cycle. Initial tests have shown that the new system yields a comparable number of positrons to the old system.
Methods for reducing the radius, temperature, and space charge of nonneutral plasma are usually r... more Methods for reducing the radius, temperature, and space charge of nonneutral plasma are usually reported for conditions which approximate an ideal Penning Malmberg trap. Here we show that (1) similar methods are still effective under surprisingly adverse circumstances: we perform SDR and SDREVC in a strong magnetic mirror field using only 3 out of 4 rotating wall petals. In addition, we demonstrate (2) an alternative to SDREVC, using e-kick instead of EVC and (3) an upper limit for how much plasma can be cooled to T < 20 K using EVC. This limit depends on the space charge, not on the number of particles or the plasma density.
The goal of the ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) CUSP experime... more The goal of the ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) CUSP experiment at CERN's Antiproton Decelerator is to measure the ground state hyperfine splitting of antihydrogen in order to test whether CPT invariance is broken. The ASACUSA hodoscope is a detector consisting of two layers of 32 plastic scintillator bars individually read out by two serially connected silicon photo multipliers (SiPMs) on each end. Two additional layers for position resolution along the beam axis were scintillator fibres, which will now be replaced by scintillating tiles placed onto the existing bars and also read out by SiPMs. If the antiproton of antihydrogen annihilates in the center of the hodoscope, particles (mostly pions) are produced and travel through the various layers of the detector and produce signals. The hodoscope was successfully used during the last data taking period at CERN. The necessary time resolution to discriminate between particles travelling through the detector from outside and particles produced in the center of the detector was achieved by the use of waveform digitisers and software constant fraction discrimination. The disadvantage of this readout scheme was the slow readout speed, which was improved by two orders of magnitude. This was done by omitting the digitisers and replacing them with TDCs reading out the digital time-over-threshold (ToT) signal using leading edge discrimination.
Magnetized nonneutral plasma composed of electrons or positrons couples to the local microwave en... more Magnetized nonneutral plasma composed of electrons or positrons couples to the local microwave environment via cyclotron radiation. The equilibrium plasma temperature depends on the microwave energy density near the cyclotron frequency. Fine copper meshes and cryogenic microwave absorbing material were used to lower the effective temperature of the radiation environment in ASACUSA's Cusp trap, resulting in significantly reduced plasma temperature.
The UKRI funded Robotics and Artificial Intelligence in Nuclear (RAIN) Hub objective is to perfor... more The UKRI funded Robotics and Artificial Intelligence in Nuclear (RAIN) Hub objective is to perform R&D to create intelligent robots that can operate in nuclear environments. The radiation environment damages sensors, cables and mechanical systems, and micro-controllers and microprocessors. It is important to identify key components and find Commercial Off-The-Shelf (COTS) solutions that enable robots to work for sufficient periods in nuclear radiation environments. This is especially important for nuclear decommissioning. As a first case study, the radiation tolerance of a COTS LiDAR system has been evaluated. Laser light detection and ranging (LiDAR) systems are widely used in robotics to build up an image of the environment in which the robot is operating. The LiDAR module tested was the STMicroelectronics VL53L0X, a new generation Time-of-Flight (ToF) laser-ranging module housed in a very small package. The package includes a 940 nm VCSEL (Vertical Cavity Surface-Emitting Laser) laser, SPAD (Single Photon Avalanche Diode) array, on-board memory and microcontroller. Beta (Strontium-90) and gamma (Cobalt-60) sources were used to evaluate the LiDAR for Single Event Upset and Total Ionizing Dose Effects. This complicated but inexpensive system was found to show no degradation in performance up to the maximum ionising dose achieved of 5800 Gray. This is more than adequate for nuclear decommissioning applications.
Testing of the X3 detectors from Micron Semiconductor Ltd. [1] at ELI-NP with α-source using a co... more Testing of the X3 detectors from Micron Semiconductor Ltd. [1] at ELI-NP with α-source using a conventional read-out chain based on charge-sensitive Mesytec MPR-16 preamplifiers showed better results than those published for similar arrays (ANASEN or ORRUBA). Now we propose to perform more complex tests using deuteron beams and three targets: 12 C, 24 Mg, and 197 Au. The proposal has primarily the aim of testing part of the ELISSA array developed by an ELI-NP and INFN-LNS collaboration and develop the data acquisition system. The proposed tests will evaluate the technical capabilities of our detectors and identify the problems.
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with a high repetition rate to produce a beam of antihydrogen. In this work, details
of the positron production apparatus used for the first observation of the antihydrogen
beam, and subsequent measurements are described in detail. This apparatus replaced the
previous compact trap design resulting in an improvement in positron accumulation by
a factor of (52 ± 3).