JPH01239800A - Microtron - Google Patents

Abstract

PURPOSE:To take out different energy particles by providing RF separators on orbits corresponding to different energies and taking out a punch every natural number of punch lines of beams. CONSTITUTION:On orbits corresponding to different energies, RF separators 7, 8 are provided. A wave form a is punch line initially passed through an accelerating tube. Denoted at Ea is an energy, which is lined at punch intervals T according to the accelerating frequency. The energy is increased as Eb, Ec every time it is passed through the accelerating tube. When the RF separator 7 on the orbit 5 is operated as a wave form d, the orbit of the energy particles are partly bent, further deflected by a deflection magnet 9, and taken out of the device. When the RF separator 8 on the orbit 6 is operated as a wave form f, then a part of the energy particles is taken out in a wave form e. The punch line of the particles accelerated at last has a wave form as g. Thus, three kinds of different energy particles can be taken out simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a microtron capable of simultaneously extracting a plurality of charged particles of different energies.

(Conventional Technique 4) An example of the configuration of a conventional device is shown in the 39th section. Particles emitted from the gun 1 are accelerated to D0 speed by the accelerating tube 2, their trajectory is bent by the deflection magnet 3I, and the particles are again accelerated to υ speed by the υ velocity tube 2. Particles that have obtained high energy by passing through the acceleration tube multiple times in this way are taken out of the apparatus along the outermost trajectory 4 by 1 m.

During this time, there is no special mechanism for taking out the items, so the items are taken out at the same time! Particles have only one type of energy.

(Issues that Seimei would like to solve) As mentioned above, it is difficult to extract particles with multiple energy directivity using conventional devices. Therefore, Akira Motoyaku's objective is to provide a microtron that can eliminate the above-mentioned intermittent points.

[Structure of the invention]

(Means for solving the problem of charging) ``In the microtron according to the present invention, an RF separator is installed on the orbit corresponding to the energy of the beam, which is a natural number of the beam's energy. I try to take out every other bunch.

(Function) By installing an RF separator on the orbit, multiple energy loads can be carried out. I! It becomes possible to take out particles at the same time.

(Example) An example will be described below with reference to the drawings. Basically, the configuration is the same as that of the conventional example, but as shown in FIG. 41, RF separators 7.8 are provided on orbits corresponding to different energies. The formation of the RF separator will be explained with reference to FIG. The waveform fa) in FIG. 2 is the punch row that first passed through the υ mouth velocity tube. Energy (maga. υ fast solidification period (according to f)
I'm reading. Assuming that the vertical axis represents energy, in the conventional example, the waveform [b), fc
As shown by H, the energy increases as gb and Ec. Here, when the RF 7 palator 7 on the orbit 5 in FIG. This is combined and taken out from the apparatus, and the punch row corresponding to path 41L 6 has a waveform like iel. missing 1ko orbit 6
When the upper RF separator 8 is operated as in waveform fe), a part of the energy particles in waveform fe) are extracted.

[Particles accelerated to the end] The punch row has a waveform like [g]. As a result, in this implementation, I simultaneous φ3f
'1 Particles with different energies can be extracted. Here, the operation of the RF separation is shown in the waveform fd) +'
e) 'f) It would be desirable to be able to move like a delta function.

Since the arrangement is as in the example, the acceleration frequency frf
The two modes can be excited at the same time, or they can be excited one by one into the RF pallet, or a plurality of RF pallets can be arranged in series at different frequencies. In this case, cos2yrfoN-eos2yrf
lt-l-aOs2πf, t')) The waveform is shown in h. If we add even higher-order modes, the delta function will become even closer to this.

A summary of each V-cedar in Fig. 2, detailed above, is as follows.

Waveform fa) Punch train passing through orbit 5 in a conventional microtron Waveform ib) Punch train passing through orbit 6 in a conventional microtron Waveform waveform) Punch train passing through orbit 4 in a conventional microtron Row waveform + dl Deflection strength waveform of RF separator 7 [e] $ between inactive, punch row waveform passing through trajectory 6 in 4 rows (f) Deflection strength of RF separator 8, waveform (g1
In the embodiment of the present invention, vanteta 1j ′e passing through orbit 4 has the form (bl cos2πfo t+cos2πfl
t+cos2πf, tO) Waveform Also, when the separator is placed vertically or the deflection for taking out is placed vertically with a low force (ma''' implementation row (ζ is not limited. In the example shown in Figure 1).

RF-! It is also possible to provide a part of the comb and a 1gl magnet for take-out in the cut of the deflection magnet just before entering the v mouth speed tube ζ. Mafko,
Even though the RFt parator has not one cavity but several cavities in series, it is clear that ρ).

The beam 0) direction of extraction is also not limited to the example.

[Takuma effect]

As mentioned above, according to Fukkama, there is only one outfit.

Be able to collect particles of different energies.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of a microtron with an inactive engine, Figure 2 is a time chart explaining the operation of the MFF1J, and Figure 3 shows a conventional microtron. ffl diagram. l...gun, 2...υ mouth speed L3.9.10...biased +
i] Magnet. 4.5.6,10,11...Trajectory of charge 4 particles, 7°8
...RF separator. Agent: Patent Attorney: Yudo Chika Ken, Hikaru Matsuyama ζ0-)
3<b) 呵-r= 1,000th figure

Claims (2)

[Claims] (1) In a microtron that obtains high acceleration by passing charged particles multiple times through the same acceleration tube, particles with different energies pass through different trajectories at a frequency that is a natural number fraction of the acceleration frequency of the acceleration tube. A microtron, characterized in that it has an RF separator that operates at an orbit corresponding to the required energy. (2) The microtron according to claim 1, wherein the RF separator operates in a superposition of modes of a plurality of frequencies.