Time structure of an accelerated beam using a radio-frequency quadrupole linac with direct plasma injection scheme
In direct plasma injection scheme, the relation between the ion current from a laser ion source and the accelerated beam current by a radio-frequency quadrupole (RFQ) linac was studied by a series of the following analyses. First, ion current at beam extraction was calculated from measured plasma parameters using a scaling law. Second, the beam emittance at the entrance of acceleration electrode region was evaluated by the simulation of the ion extraction out of the ion source plasma using the result of the first calculation. Last, the accelerated beam current could be reproduced by the simulation of beam acceleration using the results of the second. The second calculation revealed the time variation in the injected beam parameter to the RFQ linac. Then it was proved that the time structure of the accelerated beam was different from that of the injection beam because the degree of the matching between the injected beam emittance and the RFQ acceptance varied with time.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 983851
- Report Number(s):
- BNL-91342-2010-JA; RSINAK; R&D Project: KBCH139; KB0202011; TRN: US1005041
- Journal Information:
- Review of Scientific Instruments, Vol. 81, Issue 2; Conference: 13th International Conference on Ion Sources; Gatlinburg, TN; 20090921 through 20090925; ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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