Considerations for the Design of the Beam current Monitor System For the Spallation Neutron Source (SNS)

Technical Report · Tue Mar 05 04:00:00 EST 2002

DOI:https://doi.org/10.2172/1157281· OSTI ID:1157281

Kesselman, M. ^[1]

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1. Brookhaven National Laboratory (BNL), Upton, NY (United States)

The Spallation Neutron Source to be built at ORNL is comprised of a source of H^- particles (FE), a medium energy beam transport (MEBT), a linear accelerator (Linac), a high energy beam transport (HEBT), a stripper changing the H^- to H⁺ and an accumulator ring (Ring), a ring to target beam transport (RTBT), and a target. Current wave shapes will vary at different places along the system. The source will generate charge bunches that will have an amplitude near 50ma peak (38ma peak in the MEBT, Linac, and HEBT), and bunch widths of 300ns to 645ns (defining a mini-pulse). The bunches are repeated at the revolution period about 945ns. This provides a “gap” time of about 300ns used by the ring to kick the beam out to the target. The pulses are accumulated by the ring for 1ms (about 1060 mini-pulses) after which the entire ring is dumped to the target. The process is repeated at a 60Hz rate. The 1 ms pulse duration constitutes a “macro-pulse”. An RF micro-structure of 402.5MHz is generated by the accelerator RF.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 1157281
• Report Number(s): BNL--105672-2014-IR-Rev.1
• Country of Publication: United States
• Language: English

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