Optimization of Diffuser (Pre-Scatterer) Configurations for Slow Extraction Loss Reduction at Electrostatic Septa

Conference · Fri Jun 01 00:00:00 EDT 2018

DOI:https://doi.org/10.18429/JACoW-IPAC2018-TUPAF053· OSTI ID:1478030

Goddard, Brennan  ^[1]; Balhan, Bruno ^[1]; Barna, Daniel ^[2]; Borburgh, Jan ^[1]; Fraser, Matthew ^[1]; Jorat, Louise Olivia ^[1]; Kain, Verena  ^[1]; Lolliot, Christophe ^[1]; Nagaslaev, Vladimir  ^[3]; Stoel, Linda ^[1]; Van Trappen, Pieter ^[1]; Velotti, Francesco  ^[1]

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1. CERN
2. Wigner RCP, Budapest
3. Fermilab

Uncontrolled beam loss at the electrostatic septum is a performance limit for several existing or planned high power hadron accelerators delivering slow-extracted spills to fixed targets. A passive diffuser, or pre-scatterer, in a suitable configuration has been shown to reduce such beamloss significantly, with the actual gain factor depending on the parameters and details of the extraction process and hardware. In this paper, the optimization of diffuser configurations is investigated for a range of beam energies and extraction conditions, and the sensitivity to the available parameters explored via simulation results. The advantages and limitations of the diffuser are discussed and conclusions drawn concerning the specific case studies of the 8 GeV Fermilab debuncher ring and 400 GeV CERN SPS.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1478030
• Report Number(s): FERMILAB-CONF-18-456-AD; 1690645
• Resource Relation: Conference: 9th International Particle Accelerator Conference, Vancouver, BC Canada, 04/29-05/04/2018
• Country of Publication: United States
• Language: English

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43 PARTICLE ACCELERATORS