Week 28 MSWG Report SPS OP Crew 2182021
- Slides: 8
Week 28 MSWG Report – SPS OP Crew 2/18/2021
• LHC beams: Status of beams • Successful deployment of 100 ns and 50 ns beams in the LHC – operational • LHC 1 used for BCMS physics beam – operational (sometimes needs injection steering in TI 2) • LHCINDIV with special INDIVs used for BSRT calibration – operational • Fixed target beams: • SFTPRO 2 – operational (20/37/1120/20; sometimes at slightly lower DC for ZS) • Problems with intensity fluctuations in T 2 – under observation • Ions: • Some tests on the ion cycle early this week • Hi. Rad. Mat: • Prepared after dedicated MD; 3 injections with FT okay; 4 injections with ZS @ -30 k. V okay – operational (dedicated run foreseen Wednesday from 8: 00 – 22: 00) • Awake: • Took beam regularly during week – operational 2/18/2021
MDs – week 27 • 4 dedicated MDs in parallel! 2/18/2021
MDs • SFTPRO 1: • Chroma measured with and without extraction sextupoles (for simulations and to compute momentum spread). • Chroma appears much more positive than measured 2 years ago for same knob value. • Coast test: • Coast cycle entered into the supercycle • Coast sequence could finally not be launched due to block of access to the CBCM main folder. • High intensity MD: • Longitudinal measurements limited to 3 batches at 1. 3 e 11 ppb • Transverse instability measurements taken wit multiacquisition of headtail monitor • Q’’: • Checks on horizontal instability and on the effects of stabilization using Q’’ ongoing during night 2/18/2021
MDs • Wideband feedback: • Longer term plan to measure TMCI mitigation at higher intensities. 2/18/2021
MDs • Wideband feedback: • Longer term plan to measure TMCI mitigation at higher intensities. • Slotline kicker hooked up to power amplifiers. Slotline kicker times up. Relative phases of stripline and slotline needed to be corrected (access this morning) 2/18/2021
Incoming • LHC MDs in 2 weeks – special beams: • MD 3284: Pb 81+ (in principle already taken up to the SPS) • MD 3300: BCMS with LHC bunch intensity of 0. 3 E 11 and 0. 8 E 11 (in principle already prepared for LHC MD 1 except for the lowest intensity) • MD 2901: LHCINDIV with 0. 8 E 11 and 1. 8 E 11 • MD 3583: 8 b 4 e – taken in the past but saw some blow-up in the vertical plane along the ramp ( 1. 6 um) • Hi. Rad. Mat: • Starting on Monday – bunches up to 216 with FT cycle • 288 bunch beams foreseen for Wednesday after the dedicated MD from 18: 00 – 22: 00 – no FT beams 2/18/2021
