Design, simulation and conditioning of the fundamental power couplers for BNL SRF gun

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The 704 MHz SRF gun for the BNL Energy Recovery Linac (ERL) prototype uses two fundamental power couplers (FPCs) to deliver up to 1 MW of CW RF power to the half-cell cavity. To prepare the couplers for high-power RF service and process multipacting, the FPCs should be conditioned prior to installation into the gun cryomodule. A room-temperature test stand was configured for conditioning FPCs in full reflection regime with varied phase of the reflecting wave. The FPCs have been conditioned up to 250 kW in pulse mode and 125 kW in CW mode. The multipacting simulations were carried out ... continued below

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Xu, W.; Altinbas, Z.; Belomestnykh, S. & Ben-Zvi, I. May 20, 2012.

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The 704 MHz SRF gun for the BNL Energy Recovery Linac (ERL) prototype uses two fundamental power couplers (FPCs) to deliver up to 1 MW of CW RF power to the half-cell cavity. To prepare the couplers for high-power RF service and process multipacting, the FPCs should be conditioned prior to installation into the gun cryomodule. A room-temperature test stand was configured for conditioning FPCs in full reflection regime with varied phase of the reflecting wave. The FPCs have been conditioned up to 250 kW in pulse mode and 125 kW in CW mode. The multipacting simulations were carried out with Track3P code developed at SLAC. The simulations matched the experimental results very well. This paper presents the FPC RF and thermal design, multipacting simulations and conditioning of the BNL gun FPCs.

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  • 2012 International Particle Accelerator Conference (IPAC 2012); New Orleans, LA; 20120520 through 20120525

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  • Report No.: BNL--96821-2012-CP
  • Grant Number: DE-AC02-98CH10886
  • Office of Scientific & Technical Information Report Number: 1044759
  • Archival Resource Key: ark:/67531/metadc843749

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  • May 20, 2012

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  • May 19, 2016, 9:45 a.m.

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  • April 3, 2017, 12:23 a.m.

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Xu, W.; Altinbas, Z.; Belomestnykh, S. & Ben-Zvi, I. Design, simulation and conditioning of the fundamental power couplers for BNL SRF gun, article, May 20, 2012; United States. (digital.library.unt.edu/ark:/67531/metadc843749/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.