Minutes BWS Upgrade: Electro-Mechanical Design Meeting #31 -- 12th June 2018 --

Participants: R. Veness, F. Roncarolo, J. Emery, P. Andersson, D. Gudkov, J.L. Sirvent

Agenda (https://indico.cern.ch/event/729280/)

1. Series Production Production (D.Gudkov)

• All parts delivered except:
  • Tanks will all be delivered at the same time, end of November 2018.
  • Delivery dates - PS in Feb 2019-June, Booster july, SPS September
• Visit from Emilien in ~3 weeks
• Prototype tank from vacuum project received (for the PSB) at CERN. Should be complete mid July.
• Metallic discus - 30 blanks ordered RSA905 with LTultra. Not yet placed order for engraving.
• Shaft is compatible with all discs. Some difference in inertia. Series shaft has longer thread, so would be better for glass disc.
• Series should be ready for installation in September.
• 3/4 stepped chambers are ready.
• Yvon Boyer managed to machine the key slots properly in the shafts, so will complete the series with them
• Viewports - Can order 30 viewports from Vac Com with 4-5 weeks delivery. Agree for the moment to only put on 2 viewports per instrument.
• Assembly area is ready. All kinematic units ready for end of September.
• Photographer coming tomorrow afternoon.
• Would like to make some tests of kinematic unit in the lab - perhaps from this summer, so that we can make some burn-in cycles.
• There si a d-space system with rack and wheels being assembled. This is probably the only way to make nominal cycles.
• Will come back in the next meeting and report on what is practical. Could imagine to do this in batches.

2. Electronics Progress (J.Emery):

• There is enough hardware that could be assembled for a test. Missing software and firmware. However, iterations are in-progress with design office (eg for the Mezzanine).
• There was an internal review last week for the three cards. Made some suggestions for EM compatibility etc, and was a positive process.
• Software section ‘on hold’ due to resolver issue. New staff (Lioc Fosse) just started, but not yet operational. Firmware now being worked-on with Status with new VME board.
• Started on architecture with Ana G.
• Risks - only test in one machine so different EM environment. Different VMC architecture. Effect of the beam on the acquisition chain (but this will be done ASAP).
• Confident that performance test and calibration bench with be enough.
• SPS cable run of ~200m for 519, this is less than current 290m in SPS. Currently 185m installed in longest run. Problem with loss of current in the cable run. They have a fix that would improve this.
• Ray ask how much margin we have in the system. No clear answer for now. Will be able to answer in July when we make tests in B.867.
• PMT base - PCBs should be delivered tomorrow, but housing perhaps not before July.
• Resolver filter (update from last meeting), now 600 scans with beam. 3 to investigate as some issues.
• Jonathan proposes 1280 CHF for 2x digital meters that will allow a logging of the wire continuity at all times.
• Dmitry will send revised code splitting including ESS series.

3. Test results from PS (J.L.Sirvent)

• 631 scans in total in the PS.
  • LHC probe, ~6e9 protons
  • LHCINDIV -singel buch with 0.8x10e11 Protons
  • TOF with ~7e12 protons
• No sign of disc drift
• Jitter 205 uS comparing disc with position.
• Possibly some drift of the glass disc - to be confirmed.

4. Holidays (R.Veness)

• Jose spain 3 weeks end-july then back ~15 august
• Dmitry next wednesday for 2 weeks upto 4 july then 15-25 august
• Federico last week of july then 15 august for some days
• Jonathan june for training then last 2 weeks in august
• Patrick 2 first weeks in August

5. TS1 Interventions (R.Veness)

5.1. PSB

• Agree we change the scanner if possible, if not the change wires on the installed scanner.
• Need to check on the solution for re-fixing the Kapton wire in place.

5.2. SPS

• 521 intervention is ready for linear scanner. Wire is OK.
• Do we update the software in the SPS?

5.3 PS

• Nothing to do in the shutdown