1 / 9

MD 2186 : New Method to Measure Margins between IP6 Absorbers and TCTs/Triplets

MD 2186 : New Method to Measure Margins between IP6 Absorbers and TCTs/Triplets. R. Bruce, James Molson, Yuancun Nie, Matthieu Valette, Christoph Wiesner , Daniel Wollmann. Introduction. Goal:

rmurray
Download Presentation

MD 2186 : New Method to Measure Margins between IP6 Absorbers and TCTs/Triplets

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MD 2186: New Method to Measure Margins between IP6 Absorbers and TCTs/Triplets R. Bruce, James Molson, Yuancun Nie, Matthieu Valette, Christoph Wiesner, Daniel Wollmann MD2186

  2. Introduction • Goal: • Beam-based measurement of aperture margin between TCDQ (IR6) and TCTs in IP5 to validate protection in case of an asynch. dump (Beam 2). • Method: • Simulate asynchronous MKD kick with a closed corrector bump between IR6 and IP5 • Blow-up the beam to define aperture at TCDQ • For a given TCDQ position: move TCTPH (IP5) in until beam losses are observedto measure aperture at TCT • MD performed on 28.10.2018 MD2186

  3. Main MD Parameters • 3 pilots (~1e10 p+), distributed in buckets 1, 8911, 17851 • Only Beam 2 • 6.5 TeV, collision, 30 cm, 160 µrad • Orbit bumps of ~2.3σ and ~3.5σ from IR6 to IP5 Measured bump of 2.3 sigma from IR6 to IP5 MD2186

  4. MD Overview bump at TCT Move TCDQ and TCSP out Move TCPs out to ~7 σ 2.3σ bump at TCDQ Increase bump to 3.5σ and blow up beam Blow-up / losses at TCDQ Move TCT in (BBA) #2 Move TCT in (BBA) #1 After each BBA: Verified that losses are coming from the left jaw of TCTPH.4R5.B2 by stepping each side in with 10 um steps MD2186

  5. MD Results beam position at TCDQ -0.3σ -2.6σ beam position at TCT beam envelope at TCDQ after 1st blow-up: ~4.6σ measured beam envelope at TCT: ~4.6σ Good agreement between expected and measured TCT positions beam envelope at TCDQ after 2nd blow-up: ~4.4σ measured beam envelope at TCT: ~4.6σ -7.2σ TCDQ position σx (TCT) = 0.95 mm σx(TCDQ) = 0.53 mm TCT position MD2186

  6. MD Results *TCTPH.4R5.B2:MEAS_RESOLVER_LU • **Values used for calculation: • TCTPH.4R5: βx = 1791 m • TCTPH.4R5: σx = 0.95 mm • TCSP.A4L6 : βx = 546 m • TCSP.A4L6 : σx = 0.53 mm Detailed study, including estimation of errors/uncertainties, ongoing. MD2186

  7. Conclusions and Remarks • New method to measure margins between IR6 absorbers and TCTs in IP5 tested and successfully validated • Good agreement between expected and measured values observed • Extend method to B1? • Bonus: Beam dumped by blow-up in nominal collimator settings  Secondary losses in IP5, which can be further analyzed. Thanks a lot to OP and COLL for the support! MD2186

  8. Thank you for your attention!

  9. Orbit bump Calculated 2σ bump (Beam 2) TCDQ TCTPH (IP5) M. Valette MD2186

More Related