Comparison of beam simulations with measurements for the LEDA LEBT H/sup +/ beam

Smith, H. Vernon; Figueroa, T. L.; Hansborough, L.D.; Harrington, M.; Johnson, K.F.; Kerstiens, D.; Nath, S.; Sherman, J.D.; Stevens, R.R.; Thuot, M.; Young, L.M.; Zaugg, T.; Arvin, A.H.; Bolt, A.S.; Richards, M.C.; Kamperschroer, J.

doi:10.1109/pac.1999.794317

Cited by 9 publications

(10 citation statements)

References 7 publications

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“…High RFQ and HEBT beam transmission has been established and the design RFQ output beam energy has been achieved. Observed RFQ transmission, at the present low beam currents, is consistent with PARMTEQM simulations [4] based on modeling of the present injector extraction system. …”

Section: Discussionsupporting

confidence: 87%

“…The major accelerator subsystems are the injector [3,4] (source and Low Energy Beam Transport (LEBT)), RFQ [2], High Energy Beam Transport (HEBT) [5], and the beam stop [6].…”

Section: Leda Configurationmentioning

confidence: 99%

“…The 8-m-long, 350-MHz RFQ structure [2] is designed to accelerate the dc 75-keV, 110-mA H + beam from the LEDA injector [3,4] with >90% transmission. On March 16, 1999 first beam was accelerated through the LEDA RFQ.…”

Section: Introductionmentioning

confidence: 99%

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Commissioning of the Low Energy Demonstration Accelerator (LEDA) radiofrequency quadrupole (RFQ)

Johnson

Gilpatrick²,

Gurd³

et al.

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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Initial commissioning of a 6.7-MeV 100-mA RFQ is underway. The RFQ is part of LEDA, the H + injector for the Accelerator Production of Tritium (APT) project. To benchmark the RFQ performance, beam physics experiments will be done with low and high current beams for both pulsed and cw beam operation. Commissioning efforts thus far have been limited to low-current pulsedbeam LEDA operation.Measurements to fully characterize the RFQ will ultimately include the dependence of RFQ beam transmission on RFQ vane voltage, input beam energy, input match, and input transverse centroids. Other commissioning measurements for the RFQ will include output beam energy, phase, noise, transverse profiles, and transverse rms emittances. This paper contains initial LEDA RFQ commissioning results, including RFQ pulsed output beam currents up to 40 mA.

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Section: Discussionsupporting

confidence: 87%

“…The major accelerator subsystems are the injector [3,4] (source and Low Energy Beam Transport (LEBT)), RFQ [2], High Energy Beam Transport (HEBT) [5], and the beam stop [6].…”

Section: Leda Configurationmentioning

confidence: 99%

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Commissioning of the Low Energy Demonstration Accelerator (LEDA) radiofrequency quadrupole (RFQ)

Johnson

Gilpatrick²,

Gurd³

et al.

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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“…In addition, a realistic description of the input beam is required to accurately simulate beam losses in the RFQ. Simulations of the beam transport through the LEBT [15] with PARMELA [16,17] produce a more realistic distribution of particles for input into the RFQ codes than the ideal input distributions.…”

Section: Rfq Electromagnetic Designmentioning

confidence: 99%

RFQ Designed to Accept Beam from a Weak Focusing LEBT

Young¹

2002

AIP Conference Proceedings

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Abstract.The LEDA RFQ is a 350-MHz continuous-wave (CW) radio-frequency quadrupole linac. LEDA was designed as the full power front-end prototype for the accelerator production of tritium (APT) linac. This machine has accelerated a 100-mA CW proton beam from 75 keV to 6.7 MeV. The 8-m-long RFQ accepts a dc, 75-keV, ~110-mA H + beam from the LEDA injector, bunches the beam, and accelerates it to full energy with ~94% transmission. Output beam power is 670 kW. This RFQ consists of four 2-meter-long RFQs joined with resonant coupling to form an 8-meter-long RFQ.

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“…2 of Ref. 3) matches the 75-keV, 110-mA dc proton beam into the RFQ. Simulations of offline injector measurements [18] indicate the RFQ input beam rms normalized emittance is ≤0.23 π mm mrad [6]. A current modulator feeding the microwave magnetron provides beam pulsing [19] for commissioning and beam-tuning activities.…”

Section: Rfq Configurationmentioning

confidence: 99%

Low-Energy Demonstration Accelerator (LEDA) test results and plans

Smith

Schneider

Sheffield

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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The LEDA 75-keV injector and 6.7-MeV RFQ have been tested with pulsed and cw proton beam currents up to 100 mA. Several LINAC2000 papers give the results of those measurements. A follow-on experiment, to intentionally introduce and measure beam halo on the RFQ output beam, is reported in several papers at this conference (PAC2001). In this paper we summarize the LEDA RFQ commissioning results and the beam-halo measurements and we discuss future test plans for this high-current, high-average-power rf structures test bed.

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Comparison of beam simulations with measurements for the LEDA LEBT H/sup +/ beam

Cited by 9 publications

References 7 publications

Commissioning of the Low Energy Demonstration Accelerator (LEDA) radiofrequency quadrupole (RFQ)

Commissioning of the Low Energy Demonstration Accelerator (LEDA) radiofrequency quadrupole (RFQ)

RFQ Designed to Accept Beam from a Weak Focusing LEBT

Low-Energy Demonstration Accelerator (LEDA) test results and plans

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