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Development of an SCRFQ heavy-ion linac for RI beams

Technical Report:

Abstract

A split coaxial RFQ (SCRFQ) is being developed to accelerate RI beams from 1 to 170 keV/u in the Japanese Hadron Project (JHP). Our SCRFQ is equipped with modulated vanes. On the basis of the studies on a cold model and a proton accelerating one, a 25.5-MHz prototype for the JHP SCRFQ has been constructed. The prototype consisting of three module-cavities is 2.1 m in length and 0.9 m in inner diameter, and accelerates ions with a charge-to-mass ratio (q/A) greater than 1/30 from 1 to 45.4 keV/u. The measured unloaded Q-value of the cavity is 6400 corresponding to about 84% of a calculated value, and the field imbalance between vanes is within {+-}0.6%. The designed intervane voltage of 109 kV for ions with q/A = 1/30 is achieved with a 70 kW peak power. By using ions of three species N{sub 2}{sup +}, N{sup +} and Ne{sup +}, acceleration tests are conducted. The transmission efficiency attained with a N{sup +} beam is better than 80% at normalized intervane voltages higher than 1.2. (author).
Publication Date:
Sep 01, 1991
Product Type:
Technical Report
Report Number:
INS-892
Reference Number:
SCA: 430100; PA: JPN-91:011238; SN: 92000630654
Resource Relation:
Other Information: PBD: Sep 1991
Subject:
43 PARTICLE ACCELERATORS; QUADRUPOLE LINACS; HEAVY IONS; RADIOISOTOPES; ACCELERATION; KEV RANGE 100-1000; CAVITY RESONATORS; ELECTRIC FIELDS; PERFORMANCE TESTING; EFFICIENCY; RESEARCH PROGRAMS; 430100; DESIGN, DEVELOPMENT, AND OPERATION
OSTI ID:
10109107
Research Organizations:
Tokyo Univ., Tanashi (Japan). Inst. for Nuclear Study
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Other: ON: DE92751047; TRN: JP9111238
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
JPN
Size:
15 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Arai, S, Imanishi, A, Morimoto, T, Tojyo, E, Tokuda, N, and Shibuya, S. Development of an SCRFQ heavy-ion linac for RI beams. Japan: N. p., 1991. Web.
Arai, S, Imanishi, A, Morimoto, T, Tojyo, E, Tokuda, N, & Shibuya, S. Development of an SCRFQ heavy-ion linac for RI beams. Japan.
Arai, S, Imanishi, A, Morimoto, T, Tojyo, E, Tokuda, N, and Shibuya, S. 1991. "Development of an SCRFQ heavy-ion linac for RI beams." Japan.
@misc{etde_10109107,
title = {Development of an SCRFQ heavy-ion linac for RI beams}
author = {Arai, S, Imanishi, A, Morimoto, T, Tojyo, E, Tokuda, N, and Shibuya, S}
abstractNote = {A split coaxial RFQ (SCRFQ) is being developed to accelerate RI beams from 1 to 170 keV/u in the Japanese Hadron Project (JHP). Our SCRFQ is equipped with modulated vanes. On the basis of the studies on a cold model and a proton accelerating one, a 25.5-MHz prototype for the JHP SCRFQ has been constructed. The prototype consisting of three module-cavities is 2.1 m in length and 0.9 m in inner diameter, and accelerates ions with a charge-to-mass ratio (q/A) greater than 1/30 from 1 to 45.4 keV/u. The measured unloaded Q-value of the cavity is 6400 corresponding to about 84% of a calculated value, and the field imbalance between vanes is within {+-}0.6%. The designed intervane voltage of 109 kV for ions with q/A = 1/30 is achieved with a 70 kW peak power. By using ions of three species N{sub 2}{sup +}, N{sup +} and Ne{sup +}, acceleration tests are conducted. The transmission efficiency attained with a N{sup +} beam is better than 80% at normalized intervane voltages higher than 1.2. (author).}
place = {Japan}
year = {1991}
month = {Sep}
}