Claims
- 1. A method for controlling a particle acceleration energy in a radio-frequency quadrupole accelerator, using an RFQ accelerator including a cylindrical tank accommodating four electrodes extending axially of the tank, the electrodes defining a wavy acceleration cell around and along the axis of the cylindrical tank by the wavy edges of the electrodes, the tank being first supplied with a resonant frequency voltage having the same resonant frequency as that of the RFQ accelerator so as to put the tank into a resonant condition and then the wavy acceleration cell being supplied with charged particles at a predetermined incident energy, wherein the resonant frequency voltage is continuously shifted by a predetermined value below a voltage at which the resonant condition is effected.
- 2. A method according to claim 1, wherein the resonant frequency voltage is continuously shifted down to the value V' expressed by the equation:
- V'=Vcos .phi..sub.N
- where .phi..sub.N ON is a radio-frequency phase angle of the wavy acceleration cells adjacent to the exit of the RFQ accelerator, and V is the voltage at which the resonant condition is effected.
- 3. A method for controlling a particle acceleration energy in a radio-frequency quadrapole accelerator according to claim 1, further comprising the steps of determining a resonant frequency voltage for each peak of the incident energy experimentally, storing the values for each peak incident energy and the corresponding resonant frequency voltage in a computer and controlling said radio-frequency quadrapole accelerator in accordance with data stored in said computer.
Priority Claims (1)
Number |
Date |
Country |
Kind |
63-176540 |
Jul 1988 |
JPX |
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Parent Case Info
This is a continuation-in-part of application Ser. No. 08/014,793, filed Feb. 8, 1993, now abandoned, which is a continuation-in-part of Ser. No. 07/713,037 filed Jun. 7, 1991, now abandoned, which is a continuation of Ser. No. 07/379,337, filed Jul. 12, 1989.
Foreign Referenced Citations (1)
Number |
Date |
Country |
60-115199 |
Jun 1985 |
JPX |
Non-Patent Literature Citations (1)
Entry |
K. Tokiguchi, et al; Nuclear Instruments and Method in Physics Research B 37/38 (1989) 253-255. |
Continuations (1)
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Number |
Date |
Country |
Parent |
379337 |
Jul 1989 |
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Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
14793 |
Feb 1993 |
|
Parent |
713037 |
Jun 1991 |
|