Recent Progress on the Design of a Rotatable Copper Collimator for the LHC Collimation Upgrade

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The Phase II upgrade to the LHC collimation system calls for complementing the 30 high robust Phase I graphite collimators with 30 high Z Phase II collimators. One option is to use metallic rotatable collimators and this design will be discussed here. The Phase II collimators must be robust in various operating conditions and accident scenarios. Design issues include: (1) Collimator jaw deflection due to heating and sagitta must be small when operated in the steady state condition, (2) Collimator jaws must withstand transitory periods of high beam impaction with no permanent damage, (3) Jaws must recover from accident scenario ... continued below

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3 pages

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Smith, Jeffrey Claiborne; Keller, Lewis; Lundgren, Steven; Markiewicz, Thomas Walter & Lari, Luisella August 3, 2009.

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The Phase II upgrade to the LHC collimation system calls for complementing the 30 high robust Phase I graphite collimators with 30 high Z Phase II collimators. One option is to use metallic rotatable collimators and this design will be discussed here. The Phase II collimators must be robust in various operating conditions and accident scenarios. Design issues include: (1) Collimator jaw deflection due to heating and sagitta must be small when operated in the steady state condition, (2) Collimator jaws must withstand transitory periods of high beam impaction with no permanent damage, (3) Jaws must recover from accident scenario where up to 8 full intensity beam pulses impact on the jaw surface and (4) The beam impedance contribution due to the collimators must be small to minimize coherent beam instabilities. This paper reports on recent updates to the design and testing.

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3 pages

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  • Presented at Particle Accelerator Conference (PAC 09), Vancouver, BC, Canada, 4-8 May 2009

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  • Report No.: SLAC-PUB-13743
  • Grant Number: AC02-76SF00515
  • DOI: 10.2172/946452 | External Link
  • Office of Scientific & Technical Information Report Number: 962085
  • Archival Resource Key: ark:/67531/metadc930606

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  • August 3, 2009

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  • Nov. 13, 2016, 7:26 p.m.

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  • July 25, 2017, 2:46 p.m.

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Smith, Jeffrey Claiborne; Keller, Lewis; Lundgren, Steven; Markiewicz, Thomas Walter & Lari, Luisella. Recent Progress on the Design of a Rotatable Copper Collimator for the LHC Collimation Upgrade, article, August 3, 2009; United States. (digital.library.unt.edu/ark:/67531/metadc930606/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.