Title :
Precise energy measurement of the continuous proton beam
Author :
Feschenko, A.V. ; Ostroumov, P.N. ; Petronevich, S.A. ; Sharamentov, S.I.
Author_Institution :
Inst. for Nucl. Res., Acad. of Sci., Moscow, USSR
Abstract :
The method and the results of the proton beam energy measurements carried out on the INR (Institute for Nuclear Research) linac injection line are described. The measurements are made by a two-cavity buncher. The first cavity is used for beam bunching, and the second one serves as a beam harmonic detector. To find a particle energy distribution, the phase difference of the RF fields in the two cavities is measured. To measure the absolute value of beam energy, a mechanical movement of the second cavity is used. A cavity displacement corresponds to a 2 π phase shift of the induced field. Random errors of absolute energy measurement are due mainly to energy instability, and the values are in the range (1/4)×10-3 depending on the experimental condition. There is a systematic error because of a beam energy drift while moving the cavity. This value was 2×10-3 when special care was taken to decrease energy drift. The accuracy of the energy distribution measurements was about 10-4
Keywords :
beam handling equipment; beam handling techniques; linear accelerators; proton accelerators; INR; RF fields; beam bunching; beam harmonic detector; continuous proton beam; energy drift; energy instability; induced field; linac injection line; particle energy distribution; phase difference; phase shift; proton beam energy; two-cavity buncher; Bridge circuits; Detectors; Energy measurement; Particle beams; Phase detection; Phase measurement; Phase shifters; Pulse measurements; RF signals; Radio frequency;
Conference_Titel :
Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/PAC.1989.73465
