Difference between revisions of "Spectrometer"
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| − | + | == Milestones == | |
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| + | # [[hybrid/segmented downselect]] - <b>November 15 - done</b> | ||
| + | # [[collimators]] <b>mid- December - done</b> | ||
| + | # [[Review irradiation papers]] <b>mid-December - done</b> | ||
| + | # [[beam pipes and enclosures]] - <b>start mid-February</b> | ||
| + | # 60% Design review to do a prototype (possible spare) <b>March 8th</b> | ||
| + | ## Freeze design (config 9) by <b>February 7th</b> | ||
| + | ## collimator 5, 6 dimensions needed <b>ASAP</b> | ||
| + | ## Envelopes - before <b>end of February</b> | ||
| + | # Dates for upstream 60% <b>Fall 2020?</b> | ||
| + | # 90% Design (everything!) - <b>DirRev - July 2023</b> | ||
| + | ## Ready for CD2/3 Review | ||
| + | |||
| + | == Documentation == | ||
| − | + | To be reviewed: <br><br> | |
| − | # [[ | + | # [[Specifications document | Specifications]] |
| + | # [[Nomenclature document | Nomenclature]] | ||
| + | # [[ Radiation dose papers]] | ||
| + | # [https://userweb.jlab.org/~kashy/Moller/Beamline%202D%20drawings/ Song sheet] | ||
| + | == Ongoing Work == | ||
| − | + | For both upstream and downstream coils, check with symmetric, asymmetric coils, and target motion | |
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | # | + | # Number, z location and inner radii of collimators |
| − | ## | + | # Envelopes |
| − | ## | + | ## Actual envelop (what gets through a collimator) |
| − | ## | + | ## Envelop for what hits the detector |
| − | ## | + | ## Less subjective algorithm |
| + | ### 2D - integrate in x, y | ||
| + | ### 1%, 10% of rate? | ||
| + | # Beam vs. ee and ep generators at detector plane with backgrounds | ||
| + | # Careful evaluation of all sources in the deconvolution | ||
| + | ## Charge particles | ||
| + | ## Photons | ||
| + | ## Light guide background | ||
| + | # Determine amount of background that is delta rays or air | ||
| + | ## All info from vertex in one "container" | ||
| + | ## Other info, like what detector it hit in another "target" | ||
| + | ## Secondary signal electrons vs. true background electrons | ||
| + | # Add US and DS vacuum vessels, bellows, linkages, and US beamline to the simulation | ||
| + | # Study rare backgrounds from bellows and the linkages between strongbacks in the downstream (which should be stainless steel?) (expensive ferrous-free materials) | ||
| + | # Backgrounds as we degrade the vacuum (beam and acceptance) | ||
| − | + | {| cellpadding=5 style="margin:7px 30px 0 30px; <!-- | |
| − | + | --> float:right; border:1px solid #AA6633" | |
| − | # | + | |- bgcolor="#fbfeff" |
| − | + | | [[File:Both toroids.PNG|thumb|upright=1.5|alt=text|The MOLLER spectrometer in TOSCA]] | |
| − | + | |- | |
| − | + | |[[File:Layout.png|thumb|upright=1.5|alt=text|Layout of the hybrid torus conductor]] | |
| − | + | |} | |
| − | + | ||
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| − | + | ||
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| − | + | ||
| − | + | * Tolerances | |
| + | ** Physics - Done | ||
| + | ** Interference with envelopes - Done | ||
| + | ** Doses on coils | ||
| + | *** [[Optimizing upstream coil shielding]] (Naz) | ||
| + | ** Clean transport to dump | ||
== Working Group Members == | == Working Group Members == | ||
* Internal Working Group | * Internal Working Group | ||
| + | ** James Fast (Project lead) | ||
| + | ** Juliette Mammei (collaboration lead) | ||
| + | * External Working Group | ||
| + | * Review Committee Members (as needed) | ||
| − | |||
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Latest revision as of 14:04, 24 February 2023
| MOLLER Wiki |
| MOLLER page |
| DocDB |
| Project |
| Teleconferences |
| Bluejeans |
Milestones
- hybrid/segmented downselect - November 15 - done
- collimators mid- December - done
- Review irradiation papers mid-December - done
- beam pipes and enclosures - start mid-February
- 60% Design review to do a prototype (possible spare) March 8th
- Freeze design (config 9) by February 7th
- collimator 5, 6 dimensions needed ASAP
- Envelopes - before end of February
- Dates for upstream 60% Fall 2020?
- 90% Design (everything!) - DirRev - July 2023
- Ready for CD2/3 Review
Documentation
To be reviewed:
Ongoing Work
For both upstream and downstream coils, check with symmetric, asymmetric coils, and target motion
- Number, z location and inner radii of collimators
- Envelopes
- Actual envelop (what gets through a collimator)
- Envelop for what hits the detector
- Less subjective algorithm
- 2D - integrate in x, y
- 1%, 10% of rate?
- Beam vs. ee and ep generators at detector plane with backgrounds
- Careful evaluation of all sources in the deconvolution
- Charge particles
- Photons
- Light guide background
- Determine amount of background that is delta rays or air
- All info from vertex in one "container"
- Other info, like what detector it hit in another "target"
- Secondary signal electrons vs. true background electrons
- Add US and DS vacuum vessels, bellows, linkages, and US beamline to the simulation
- Study rare backgrounds from bellows and the linkages between strongbacks in the downstream (which should be stainless steel?) (expensive ferrous-free materials)
- Backgrounds as we degrade the vacuum (beam and acceptance)
- Tolerances
- Physics - Done
- Interference with envelopes - Done
- Doses on coils
- Clean transport to dump
Working Group Members
- Internal Working Group
- James Fast (Project lead)
- Juliette Mammei (collaboration lead)
- External Working Group
- Review Committee Members (as needed)
