Optics
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Revision as of 20:03, 3 December 2020 by Saw (Talk | contribs) (Created 03/13/12(Riordan), Last modified 03/13/12(Riordan))
The most important aspects of the optics is the momentum resolution required, how to do the calibration: specifically using some combination of ep elastics, fixed point targets, straight throughs, and angle determination.
Paul's document on ideas and requirements ps
Optics Calibration
Optics calibration can be done with some combination of the following
- ep elastics
- Fixed point target
- Carbon foils
- Straight through
- Drilling plugable holes through baffles
- Rotating baffles
- Using existing slits
- Angle determination
- Using straight-through calibration and model field changes to angle
- Sci-fi tracker just by the target
Resolution with GEMs
Elastic Rates
Elastic rates for LH2, luminosity of <math>1\times10^{37}</math>Hz/cm<math>{}^2</math>, which is about 1 uA.
|
|
| 4.4 GeV Rate - Rate [Hz/uA/mm] vs. r [mm] | 4.4 GeV - Momentum [MeV] vs. r [mm] |
|
|
| 8.8 GeV Rate - Rate [Hz/uA/mm] vs. r [mm] | 8.8 GeV - Momentum [MeV] vs. r [mm] |
|
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| 11 GeV Rate - Rate [Hz/uA/mm] vs. r [mm] | 11 GeV - Momentum [MeV] vs. r [mm] |
Summary
To get 200/cm/sector at 50uA
| E [GeV] | t [hrs] |
|---|---|
| 4.4 | 0.006 |
| 8.8 | 1.6 |
| 11 | 6 |
