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BRM ProjectsYETS & near-future consolidation and upgrades Anne Dabrowski On behalf of the Beams Condition and Radiation Monitoring Project 9th November 2011 CMS Upgrade Workshop A. Dabrowski for BRM, CMS Upgrade Workshop Nov. 2011
BRM system overview • FSC: ± 59m, ± 85m, ± 114m • PU < 10 ; Lumi < 2x1033cm-2s-1 • BCM2/1L • diamond detector; integrated current measurement • BCM2: inner: 4 diamonds (r=5cm), outer: 8 diamonds (r=28cm) • BCM1L: 4 diamonds (r=4.5cm) • Protection, monitoring possible. • PLT • Pixelated diamond tracking detector (PLT) to be installed BCM1F carriage (2013/ 2014) • Install portion of PLT on +Z castor table 2012 as a test setup • BCM1F: • diamond detector • Fast MIP counter • monitoring • BSC: • Scintillators. • For Lumi < 3x1032cm-2s-1 • Trigger for HI • Active and passive radiation monitoring devices • BPTX: • Bunch pickup trigger Signals, timing A. Dabrowski for BRM, CMS Upgrade Workshop Nov. 2011
BRM Functions A. Dabrowski for BRM, CMS Upgrade Workshop Nov. 2011
BRM Activities in CMS Cavern during the this YETS 2011 / 2012 PLT +16.0m BPTX ± 175.0m FSC ± 54, 84 and 114 m BLM ±16.0m IP TLD Variousplaces BCM1F;BCM1L ±1.8m BCM2 ± 14.4m • Shutdown work, focused on new BLM, BCM2, BSC andTLDs (where ever accessible) • Front face of HF (+Z&-Z), • BCM2 wheels (-Z&+Z), • HF platform (+Z&-Z) and Castor table (+Z&-Z) open rotating & collar shielding • PLTinstallation on +Z Castor table • Details: Divonne TC Retreat BSC ± 10.9m A. Dabrowski for BRM, CMS Upgrade Workshop Nov. 2011
Summary of positive consequences of YETS 2011/2012 interventions • BCM2 • Remove 1 pCVD diamond –Z side, 1 sCVD from +Z side, 1 silicon wafer & all TLDSs • An already irradiated diamond can be removed for studies, CCD re-measured, visual inspection, plateau etc • New diamond installed to on –Z side for radiation damage studies and improved signal/noise compared to damaged diamonds • Benefit from diamond sensor development over the last few years • HV filter box replacement – remove the RS10 thresholds – which limits the amount of detector current drawn • BLM • Additional detector installed for beam loss monitoring • Can cross calibrate with other LHC BLMS, used for BCM2 in-situ cross calibration and bench marking of Fluka MC • BSC • Preserve scintillators against radiation damage for 2012 HI run • Potentially install small tiles to recover some beam background monitoring functionality of BSC during p-p running • TLDs • Measure dose to various parts of CMS detector & bench-mark with Fluka expectations • Install new TLDs with higher dynamic range (many we believe are saturated) • PLT • Gain experience with PLT as a tracking & beam monitoring detector before 2014 installation • Note: higher radiation environment than final inner location
Summary of medium-term BRM upgrades • PLT • Install and commission PLT in early 2014 • Remove BCM1L / BCM1F and then re-install on the same carriage • Fresh diamond sensors should be available for this installation if required • BCM1F • Faster front-end (presently 30 ns peaking time) • Aim for 2014 (during PLT installation) • Evaluate additional functionality of BCM1F front-end (Atlas - time over threshold measurement for improved time resolution & 1,2,3 etc. MIP counting?) & need to install additional services? • BSC • Install “BSC” upgrade detector for high lumi > 1034 (focus Machine induced background) • Use data and Monte-Carlo simulation to identify suitable locations & fluences • Converge on most suitable (preferably existing) technologies (Mid-2012) • Installation end of LSS1 (Late 2014?) • BPTX • Move all BPTX functionality into a programmable VME board • ? Automatic phase feedback TTC system, adjustment of CLOCK steps 100 ps • BCM2/BCM1L • Spare diamond sensors • Implement improved BE/BI electronics once available (around 2013)