LARP LARP Document 1064-v1

DocDB Home ]  [ Search ] [ Last 20 Days ] [ List Authors ] [ List Topics ] [ List Events ]

e-Cloud Simulations for LHC LPA upgrade scheme

Document #:
LARP-doc-1064-v1
Document type:
Talk
Submitted by:
Chandrashekhara Bhat
Updated by:
Chandrashekhara Bhat
Document Created:
18 Jul 2012, 09:13
Contents Revised:
18 Jul 2012, 09:13
DB Info Revised:
18 Jul 2012, 09:13
Viewable by:
  • Public document
Modifiable by:
Abstract:
Recent studies in the LHC showed that 1)LHC beam-beam tune shift can be > 0.015/IP (LHC design limit <0.015/2IPs) 2) Acceptable pileup events at IP <200 (from experimenters)
In view of these the LHC LPA parameter list is revised. Here we present our preliminary effort to understand the e-cloud development with new parameters using realistic bunch profiles. Longitudinal bunch profiles are derived using ESME simulations HP distribution. Initial distribution LE(4sigma)= 2- 2.5 eVs. Various bunch profiles are generated with h=1(400MHz rf) and h=2 rf (800MHz rf) systems. We choose V2/V1= 0, 0.25, and 0.5; Bunch Intensity = 1E11 to 4E11ppb; Dipoles and Drift sections; Bunch Spacing 25 nsec and 50 nsec; SEY =2.3 -1.5 (Only the the results for SEY=1.5 will be presented) R = 0.25.
Files in Document:
  • pdf (E-Cloudmeeting-20110930-LHCLPA.pdf, 946.4 kB)
DocDB Home ]  [ Search ] [ Last 20 Days ] [ List Authors ] [ List Topics ] [ List Events ]

DocDB Version 8.7.23, contact LARP Document Database Administrators