Page History

General overview

• Run planning: https://docs.google.com/spreadsheets/d/1y8mnxkCVaOs73ekeLUS-UJZJWMsA7eOH/edit?usp=sharing&ouid=103601260766104549989&rtpof=true&sd=true
• Shift reports: https://aosd.slac.stanford.edu/facet-shift-report/shift_summary_form/ (old: http://ad-ops.slac.stanford.edu/facet-shift-report/)
• Shift summary report form: http://ad-ops.slac.stanford.edu/facet-shift-report/shift_summary_form/

Procedures

• 2024 Apr beamtime: compressed beam: https://docs.google.com/document/d/1s59R4ffiAMiaTrY8L5E0ygfwxdXjtM55ywpfnthXf0Y/edit?usp=sharing
• 2024 Feb beamtime: pencile beam: https://docs.google.com/document/d/1HHuWIIFKekMSHnjb9SSBPxSDAmATnlLgdI1ZHmqEdzU/edit?usp=sharing
• 2023 Nov 05: beam requirements & high-level procedure for electron-laser collisions (https://docs.google.com/document/d/1IqYd_exQ_7566qzT3htjqMHbH2Ii5GkTMFQAjvBKE84/edit?usp=sharing)
• 2023 Oct 09: procedure for electron-laser collisions (https://docs.google.com/document/d/1tPpJLqZOzpGEWFv78RUuRDg0SSzgegZMacqA98gymrA/edit?usp=sharing)
• 2022 Aug 05: getting ready for collisions (https://docs.google.com/document/d/1WQh2kU0Teb3-2Iplbx3_6nNYoLOaoBQQt8rGdM4eUys/edit?usp=sharing)
• 2022 Nov 14: beamvector procedure (https://docs.google.com/document/d/1S94E_sG0lsHjCt70gnzeCo6ReKtVgDCiAdlnnkhN10c/edit)

Old Procedures

• E-320 focal spot optimization with 1st OAP, YAG target alignment & imaging, electron-laser spatial overlap
  https://docs.google.com/document/d/1ggCx77pcXtmoSfgxGfD_MbEW6WvdQ0__8lb9CY_OOjM/edit?usp=sharing
  version from the June 2022 downtime access:
  https://docs.google.com/document/d/1ObcXum44AmlUi-EVv_y3cAG8wcymhELt4ZJxAfqI9Wk/edit?usp=sharing
• FACET beam vector procedure: https://docs.google.com/document/d/1S94E_sG0lsHjCt70gnzeCo6ReKtVgDCiAdlnnkhN10c/edit
• E-320 No-beam Laser Alignment, Alignment target test (attenuated laser) + repeat of high-power beam dump test (full power laser)
  https://docs.google.com/document/d/1sBxmYC8zqqaLUJwpkVYCQ3L-C04nBamIJh6C8BZw_Dk/edit?usp=sharing
• E-320 Laser Alignment, Alignment target test - attenuated laser alignment + beam
  https://docs.google.com/document/d/1ccdD5ti5yLGS0WPEwzYn_dLSlJ-0g6DjCyQwopRfQlo/edit?usp=sharing
• E-320 SFQED Assembly Commissioning Shift Plan with laser and e-beam
  https://docs.google.com/document/d/1TR6Pyk6s_p5_ibCRqRT1_EGhiL0NP0YRe1T6-oPBaRU/edit?usp=sharing
• E300/E320 Check list for full power laser test run to the tunnel V2
  https://docs.google.com/document/d/1oKyrm289sxPo8PpCDxToUMMmVZiXFL2tPrE2z2-gPrs/edit?usp=sharing

Important milestones

• Old: E-320 IP Assembly Installation Procedure for long downtime (Aug-Oct 2021)
  https://docs.google.com/document/d/1t38nrp5qCxdkixntqiXObbj4tVVpptF1c8oPHfHFXVM/edit?usp=sharing

History

• May 19-20, 2024 beamtime: recovered collisions with compressed beam but beam wasn't stable for a long time; obtained improved beam orbit (more straight through the IP): http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2024/20/19.05&pos=2024-05-19T23:59:51
• April 29-30, 2024 beamtime: collisions with compressed beam! (part 1: http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2024/18/29.04&pos=2024-04-29T23:59:59, part 2: http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2024/18/30.04&pos=2024-04-30T23:59:59)
• April 24, 2024 PAMM: Gold OAP replaced with dielectric OAP, focus much improved (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2024/17/24.04&pos=2024-04-24T23:48:34)
• February 16-18, 2024 beamtime: pencile beam, successful collision recovery, but not much nonlinear signal; low energy electron tail observed (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2024/07/16.02&pos=2024-02-16T23:59:59; http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2024/07/17.02&pos=2024-02-17T23:59:32; http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2024/08/19.02&pos=2024-02-19T23:59:00)
• November 22, 2023: electron beam was much improved, not enough time for collisions (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2023/47/22.11&pos=2023-11-22T23:59:59)
• November 18/19, 2023; electron beam was very unstable, too many drifts, no collisions (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2023/46/18.11&pos=2023-11-18T23:59:59)
• October 12/13, 2023: first beam time after the long shutdown; re-established laser-electron collisions (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2023/41/12.10&pos=2023-10-12T23:55:00)
• December 18, 2022: identifying issues with the setup, trying to get ready for remote recovery (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/50/18.12&pos=2022-12-18T23:59:59)
• December 15, 2022: wavefront optimization (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/50/15.12&pos=2022-12-15T23:59:00)
• December 14, 2022: timing measurement EOS vs. E-320, spot recovery (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/50/14.12&pos=2022-12-14T23:59:00)
• November 16, 2022: re-aligned MO tower after recent changes, aligned to beam vector, focal spot recovered (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/46/16.11&pos=2022-11-16T23:59:00)
• November 14, 2022: measured current beam vector (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/46/14.11&pos=2022-11-14T23:59:59)
• November 2, 2022: swapped spacer, replaced external limit switch, improved cabling, no laser work as both CW and pulsed IR laser were down (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/44/02.11&pos=2022-11-02T23:59:00)
• August 19, 2022: potentially measured non-linear signal (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/33/19.08&pos=2022-08-19T23:59:00, http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/33/20.08&pos=2022-08-20T06:45:00)
• August 13, 2022: first collisions! (spatial overlap with knife-edge scan, verified anticipated t0 with EOS, found timing signal on YAG which confirmed temporal & spatial overlap with RP attenuator in, went to full-power mode, compensated timing, saw gamma1 signal in timing scan, saw low-energy scattered electrons on LFOV and EDC)  http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/32/13.08&pos=2022-08-13T23:50:00, http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/32/14.08&pos=2022-08-14T03:45:46
• August 6, 2022: practiced knife-edge scans for spatial overlap verification, attempted to see linear Compton scattering (not enough laser intensity with RP attenuator in): http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/31/06.08&pos=2022-08-06T23:59:00 http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/31/07.08&pos=2022-08-07T11:00:00
• August 2, 2022: recovered laser spot, aligned YAG target, practiced spatial overlap,  couldn't find relative timing signal (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/31/02.08&pos=2022-08-02T23:50:00)
• July 26, 2022: recovered laser spot, couldn't align YAG (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/30/26.07&pos=2022-07-26T22:30:08, http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/30/26.07&pos=2022-07-26T22:00:00)
• July 10, 2022: attempt to recover laser alignment remotely (http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/27/10.07&pos=2022-07-10T23:59:44)

Other early shifts of relevance for E-320:

• May 11, 2022: Foil commissioning shift (https://docs.google.com/document/d/1IOm-yBNrRM5SL5Kz1PSp9qz6MbsmGO__9mI3ItaUfjk/edit)

• May 10, 2022: EOS commissioning shift ()

• May 8, 2022: E308 commissioning shift take 2 (https://docs.google.com/document/d/1H7Gcpjfe_1ZViNZjyoEpxbZLZsZ8MFdOxn1q42Rs2iA/edit#heading=h.2vex6f5ob2xd)
• May 7, 2022: spectrometer commissioning shift (https://docs.google.com/document/d/1A3RfoVOopjoxTbNDSk-5PemZUkAwEaoEGOnekJzoszs/edit#)2022 May 2: high-power laser beam dump test