Difference between revisions of "January 30, 2015 - Mott Group Meeting"
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: Energy and Time Cuts | : Energy and Time Cuts | ||
: Low and High Threshold | : Low and High Threshold | ||
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;Polarimeter Systematics using "nominal" beam | ;Polarimeter Systematics using "nominal" beam | ||
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:Emittance | :Emittance | ||
:Energy spread | :Energy spread | ||
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| + | : High Threshold Foils : 2,4,5 | ||
| + | : Low Threshold Foils : 1,8,12,13,14,15 | ||
==Goals/plans for beam test opportunity : Monday Feb 9 + Tuesday Feb 10 == | ==Goals/plans for beam test opportunity : Monday Feb 9 + Tuesday Feb 10 == | ||
Revision as of 12:54, 30 January 2015
Folks,
Let's meet next Friday, January 30th at 1:30pm EST in TL-2236. Some topics are listed below.
In the meantime, the Run 1 wiki has been updated run a chronology of events/logbook entries and the final on-line spreadsheet of runs and on-line results: https://wiki.jlab.org/ciswiki/index.php/Run1_-_January_2015
Blue Jeans and Wiki
Toll Free Phone number: 1-888-240-2560 Int'l Call Phone numbers: http://bluejeans.com/numbers Meeting ID: 175023762# Web connection for desktop sharing: http://bluejeans.com/175023762 Wiki: https://wiki.jlab.org/ciswiki/index.php/January_30,_2015_-_Mott_Group_Meeting
Lessons learned from Run 1
- Small aperture mouts may be impractical. Thin foils on backing on larger aperture mount seemed okay.
- Improve capability for beam characterization (emittance, momentum, energy spread, bunch length)
- VWien+Solenoids more effective than HWien
- Make measurement, analysis, data logging as automatic and convenient as possible
- Learn how to analyze target video on-line and save for off-line
- Replace viewer with either gridded chromox or YAG crystal
Divvy-up analysis and summary writing
- Spectra systematics
- Energy and Time Cuts
- Low and High Threshold
- Polarimeter Systematics using "nominal" beam
- Deadtime
- Beam current
- Target position
- Beam position : 0.22um(1) and 1um(15)
- Dump dipole
- Polariimeter Systematics using "off-nominal" beam
- PITA
- Spin Dance
- Spot size
- Cavity phase
- Beam measurements
- Momentum
- Harp calibration
- Emittance
- Energy spread
- Target Thickness Extrapolation
- High Threshold Foils : 2,4,5
- Low Threshold Foils : 1,8,12,13,14,15
Goals/plans for beam test opportunity : Monday Feb 9 + Tuesday Feb 10
- Test hardware TOF veto at 31MHz and 62MHz (6 hours)
- Test FADC without TDC (2 hours)
- Test FADC delayed operation (2 hours)
- Measure emittance with Run 1 conditions (3 hours)
Simulation progress
Target thickness measurement status
- FESEM resolution is about 1.5 nm
- Sibling list of foils used (note, 0.05um foil 12 does not have sibling and both 0.35um foils 8 and 14 have same sibling)
- Images saved as TIFF (highest quality of TIFF, BMP, JPEG)
- ImageJ is free image analysis software hosted by NIH
- 0.050 um, 6809-B (done)
- 0.225 um, 7029-B
- 0.350 um, 5613-A
- 0.500 um, 5275-C
- 0.625 um, 7028-B
- 0.750 um, 5134-B (done)
- 0.870 um, 3057-C
- 1.000 um, 5385-B