Difference between revisions of "General Meeting Summary 5/28/20"
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(Created page with "PARTICIPANTS: Charles Hyde, Bogdan Wojtsekhowski, Arshak Asaturyan, Vardan Tadevosyan, A Comer, Hamlet Mkrtchyan, Alexandre Camsonne, Paulo Medeiros, Steven Lassiter, Vladimir...") |
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| − | MAGNET | + | '''MAGNET''' |
Work ongoing | Work ongoing | ||
| − | FRAME (Carlos) | + | '''FRAME''' (Carlos) |
* Photos from pre-lock down illustrate the assembly status - some of the smaller components were assembled off-site during lock down and are ready to be included when possible | * Photos from pre-lock down illustrate the assembly status - some of the smaller components were assembled off-site during lock down and are ready to be included when possible | ||
* Small number of people allowed part time on site now and some assembly can continue, subject to new distancing rules etc. | * Small number of people allowed part time on site now and some assembly can continue, subject to new distancing rules etc. | ||
| − | NPS LOGO | + | '''NPS LOGO''' |
* Presentation of the logo planned to be included on the NPS frame | * Presentation of the logo planned to be included on the NPS frame | ||
* Optimizations and other suggestions welcome | * Optimizations and other suggestions welcome | ||
| − | CABLING | + | '''CABLING''' |
* NPS cable making is ongoing at JLab (off-site) | * NPS cable making is ongoing at JLab (off-site) | ||
::* SMA for signal | ::* SMA for signal | ||
| Line 23: | Line 23: | ||
* How to test cables? | * How to test cables? | ||
| − | MECHANICAL DESIGN (Paulo, Steven L.) | + | '''MECHANICAL DESIGN''' (Paulo, Steven L.) |
* Released requisitions for structural components (platform) | * Released requisitions for structural components (platform) | ||
| Line 31: | Line 31: | ||
* Prepared and passed on step files for corrector magnet | * Prepared and passed on step files for corrector magnet | ||
| − | * Results from field integral calculations (Bogdan) | + | * '''Results from field integral calculations''' (Bogdan) |
::* Significant integral BdL (~30-40kGauss) without corrector, need to compensate for field integral | ::* Significant integral BdL (~30-40kGauss) without corrector, need to compensate for field integral | ||
::* Field integral not large - can build corrector without much problem (cost ~$10k) | ::* Field integral not large - can build corrector without much problem (cost ~$10k) | ||
| Line 47: | Line 47: | ||
| − | HV DIVIDER - ANODE CURRENT | + | '''HV DIVIDER - ANODE CURRENT''' |
* Review of the issue and discussion of possible solutions | * Review of the issue and discussion of possible solutions | ||
| Line 57: | Line 57: | ||
| − | NEXT MEETING: THURSDAY 11 JUNE AT 9AM (ET) | + | '''NEXT MEETING: THURSDAY 11 JUNE AT 9AM (ET)''' |
Revision as of 08:48, 29 May 2020
PARTICIPANTS: Charles Hyde, Bogdan Wojtsekhowski, Arshak Asaturyan, Vardan Tadevosyan, A Comer, Hamlet Mkrtchyan, Alexandre Camsonne, Paulo Medeiros, Steven Lassiter, Vladimir Berdnikov, Carlos Munoz-Camacho, Jacob Murphy, Marie Boer, Hakob Voskanyan, Rolf Ent, David Hamilton, Julie Roche, Tanja Horn
MAGNET
Work ongoing
FRAME (Carlos)
- Photos from pre-lock down illustrate the assembly status - some of the smaller components were assembled off-site during lock down and are ready to be included when possible
- Small number of people allowed part time on site now and some assembly can continue, subject to new distancing rules etc.
NPS LOGO
- Presentation of the logo planned to be included on the NPS frame
- Optimizations and other suggestions welcome
CABLING
- NPS cable making is ongoing at JLab (off-site)
- SMA for signal
- Fischer for HV
- Samtec HV
- How to test cables?
MECHANICAL DESIGN (Paulo, Steven L.)
- Released requisitions for structural components (platform)
- Expect all other parts to be submitted by end of week
- Prepared and passed on step files for corrector magnet
- Results from field integral calculations (Bogdan)
- Significant integral BdL (~30-40kGauss) without corrector, need to compensate for field integral
- Field integral not large - can build corrector without much problem (cost ~$10k)
- Corrector cannot compensate for shift in position, still have significant displacement - shift is on level of 4cm creating a background: low energy particles will scrape beam line
- To address this issue would like to shift corrector 15cm downstream - requires to modify a pipe (~$3k)
- Discussion:
- Corrector in beam line after magnet has been difficult traditionally - cables, power supplies space issues, radiation of components
- Flux exclusion tube vs. corrector magnet? - Is there enough space? Tube seems more complex and complicated than corrector
- Installation of corrector: clamped on beam line, no separate support
- Current density: 200-300 A/cm2, no water cooling - the latter is important since located in a high radiation area
- Corrector is a protection of beam dump - magnet controlled by MCC, deflection without magnet of primary beam is 6cm at beam dump
- Can corrector magnet hang off the NPS magnet and rotate with the magnet?
- General consensus to proceed with the corrector magnet design
HV DIVIDER - ANODE CURRENT
- Review of the issue and discussion of possible solutions
- Need to reduce PMT gain - 10^6 too much and even 10^5 too much, 10^4 might be fine, but then need to figure out how to do amplification
- Bogdan's slides summarize several options to reduce anode current, but need feedback from Fernando's group on base modifications
- Action Item: Meet with Fernando on base modifications
NEXT MEETING: THURSDAY 11 JUNE AT 9AM (ET)