MPS Minutes 20220210: Difference between revisions
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Meeting commenced: 10:00am | Meeting commenced: 10:00am | ||
Meeting adjourned: | Meeting adjourned: 10:30am | ||
Present: HH, MA, KL, RN, MR, RC, AD, AL | Present: HH, MA, KL, RN, MR, RC, AD, AL | ||
| Line 6: | Line 6: | ||
*First beam on Tuesday afternoon | *First beam on Tuesday afternoon | ||
*Priority is on FLASH | *Priority is on FLASH | ||
**Plan for first FLASH tests with dead mouse or tissue in 2 weeks? | |||
**HH: Still one cable missing, that needed connector | |||
***Discussion on power limits. AL followed up with Luca. Confirmed 1kW maximum power in pulsed mode, which means 0.1mA for a maximum of 1s at 10 MeV. And for continuous beam it would be 200W | |||
*Thomas said maybe first option for MPS is today or on Monday to do re-commissioning scans | *Thomas said maybe first option for MPS is today or on Monday to do re-commissioning scans | ||
**Focus will be on dump line. | |||
**Once that's done, final thresholds can be set and updated in document "E-Linac BLM controls Configuration Specifications". And Darren can mount high energy LIC covers permanently. | **Once that's done, final thresholds can be set and updated in document "E-Linac BLM controls Configuration Specifications". And Darren can mount high energy LIC covers permanently. | ||
* | *They had beam again yesterday, egun ramp up looked like they went to 300kV without major issues. Looked fast on strip tool. Maybe 10 - 15min? | ||
*It looks like EINJ was at 980 MV/m. Yesterday EMBT:PMT3 was at 147 pC, EMBD:LIC2 saw 33 pC. | |||
==Ar supply== | |||
*AL turned on Ar flow on Tuesday -> Just one bottle. Other has different valve, which seemed stuck. | *AL turned on Ar flow on Tuesday -> Just one bottle. Other has different valve, which seemed stuck. | ||
*Regarding Ar flow interlocks to prevent running beam when Ar flow is not given, we need to request work request. | |||
*AL talked to Jessica Blando regarding Ar supply. She said she would take over for Rick and continue to be in charge of purchasing. Have quick in person meeting tomorrow as well to check out the valve. JB also doesn't have key for shed? | |||
*Need to email Keiko to add Jessica to alarm list | |||
*Discussion on whether we could use solenoid and recirculate Ar instead of the gas going to exhaust. Level of leak tightness may not be good enough to guarantee adequate purity of gas. Once could test this via detector response over time. | |||
==BLM calibration== | ==BLM calibration== | ||
*AL ready to send out document, just need to get values for LICs. There was no Ar flow until | *AL ready to send out document, just need to get values for LICs. There was no Ar flow until Wednesday | ||
*Will do another manual calibration today, add values and send out | *Will do another manual calibration today, add values and send out | ||
*Question on sequence for PMT/LIC. If first calibration point is not checking out, should system continue to second point anyways? Or state calibration error immediately and abort calibration? | *Question on sequence for PMT/LIC. If first calibration point is not checking out, should system continue to second point anyways? Or state calibration error immediately and abort calibration? Probably, just abort calibration at point 1. | ||
*Should there be an automated second attempt of the system to calibrate a channel, or should this only be initiated by expert? | *Should there be an automated second attempt of the system to calibrate a channel, or should this only be initiated by expert? | ||
| Line 22: | Line 32: | ||
*AL preparing documents for requirements and specs | *AL preparing documents for requirements and specs | ||
*No update since last time | *No update since last time | ||
==Fibre== | ==Fibre== | ||
* | *Turns out the potentially available PMTs from Conny, that one is broken and the other likely in use | ||
* | *Martin is looking into 3-4 different types, once decided, will try to 3D print coupler. | ||
* | *Will get 2 PMTs. | ||
==AOB== | ==AOB== | ||
* | *MA talked to Phil regarding LIC fabrication. Likely early March. | ||
==Action Items== | ==Action Items== | ||
*AL to send out document for view screen/BLM interlock requirements/specs | *AL to send out document for view screen/BLM interlock requirements/specs | ||
*AL to implement comments for BLM calibration requirements/specs document and send out to reviewers | *AL to implement comments for BLM calibration requirements/specs document and send out to reviewers | ||
*MA | *Submit work request for Ar flow interlock | ||
*MA to buy PMTs | |||
*Fibre coupler: MA will try to get drawings from manufacturer for 3D printing option | *Fibre coupler: MA will try to get drawings from manufacturer for 3D printing option | ||
*AL to take recommissioning scans in medium and high energy section, once beam is back. | *AL to take recommissioning scans in medium and high energy section, once beam is back. | ||
Latest revision as of 00:16, 15 February 2022
Meeting commenced: 10:00am Meeting adjourned: 10:30am Present: HH, MA, KL, RN, MR, RC, AD, AL
E-Linac status
- First beam on Tuesday afternoon
- Priority is on FLASH
- Plan for first FLASH tests with dead mouse or tissue in 2 weeks?
- HH: Still one cable missing, that needed connector
- Discussion on power limits. AL followed up with Luca. Confirmed 1kW maximum power in pulsed mode, which means 0.1mA for a maximum of 1s at 10 MeV. And for continuous beam it would be 200W
- Thomas said maybe first option for MPS is today or on Monday to do re-commissioning scans
- Focus will be on dump line.
- Once that's done, final thresholds can be set and updated in document "E-Linac BLM controls Configuration Specifications". And Darren can mount high energy LIC covers permanently.
- They had beam again yesterday, egun ramp up looked like they went to 300kV without major issues. Looked fast on strip tool. Maybe 10 - 15min?
- It looks like EINJ was at 980 MV/m. Yesterday EMBT:PMT3 was at 147 pC, EMBD:LIC2 saw 33 pC.
Ar supply
- AL turned on Ar flow on Tuesday -> Just one bottle. Other has different valve, which seemed stuck.
- Regarding Ar flow interlocks to prevent running beam when Ar flow is not given, we need to request work request.
- AL talked to Jessica Blando regarding Ar supply. She said she would take over for Rick and continue to be in charge of purchasing. Have quick in person meeting tomorrow as well to check out the valve. JB also doesn't have key for shed?
- Need to email Keiko to add Jessica to alarm list
- Discussion on whether we could use solenoid and recirculate Ar instead of the gas going to exhaust. Level of leak tightness may not be good enough to guarantee adequate purity of gas. Once could test this via detector response over time.
BLM calibration
- AL ready to send out document, just need to get values for LICs. There was no Ar flow until Wednesday
- Will do another manual calibration today, add values and send out
- Question on sequence for PMT/LIC. If first calibration point is not checking out, should system continue to second point anyways? Or state calibration error immediately and abort calibration? Probably, just abort calibration at point 1.
- Should there be an automated second attempt of the system to calibrate a channel, or should this only be initiated by expert?
View screen / BLM interlocks for tuning
- AL preparing documents for requirements and specs
- No update since last time
Fibre
- Turns out the potentially available PMTs from Conny, that one is broken and the other likely in use
- Martin is looking into 3-4 different types, once decided, will try to 3D print coupler.
- Will get 2 PMTs.
AOB
- MA talked to Phil regarding LIC fabrication. Likely early March.
Action Items
- AL to send out document for view screen/BLM interlock requirements/specs
- AL to implement comments for BLM calibration requirements/specs document and send out to reviewers
- Submit work request for Ar flow interlock
- MA to buy PMTs
- Fibre coupler: MA will try to get drawings from manufacturer for 3D printing option
- AL to take recommissioning scans in medium and high energy section, once beam is back.