Difference between revisions of "January 30, 2015 - Mott Group Meeting"
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https://wiki.jlab.org/ciswiki/index.php/Run1_-_January_2015 | 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 | |
− | ;target thickness | + | Wiki: https://wiki.jlab.org/ciswiki/index.php/January_30,_2015_-_Mott_Group_Meeting |
− | ::0.050 um, 6809-B (done) | + | |
+ | ==Lessons learned from Run 1== | ||
+ | |||
+ | # Small aperture mouts may be impractical. Thin foils on backing on larger aperture mount seemed okay. | ||
+ | # Replace viewer with either gridded chromox or YAG crystal, and learn how to use video and image tools | ||
+ | # Make measurement, analysis, data logging as automatic and convenient as possible: [[Media:DataAnaScreen.pdf]] [[Media:DataAnaScreen.pptx]] | ||
+ | # Improve or standardize our capability for beam characterization (emittance, momentum, energy spread, bunch length) | ||
+ | |||
+ | ==Sibling thickness measurement status== | ||
+ | ;FESEM measurements | ||
+ | : profile of each target to sample thickness | ||
+ | : profiles of 2-3 targets multiple foil locations (tests uniformity + preparation technique) | ||
+ | ;Sibling list | ||
+ | '''::0.050 um, 6809-B (done)''' | ||
::0.225 um, 7029-B | ::0.225 um, 7029-B | ||
− | ::0.350 um, 5613-A | + | ::0.350 um, 5613-D (changed from A) |
::0.500 um, 5275-C | ::0.500 um, 5275-C | ||
::0.625 um, 7028-B | ::0.625 um, 7028-B | ||
− | ::0.750 um, 5134-B (done) | + | '''::0.750 um, 5134-B (done)''' |
::0.870 um, 3057-C | ::0.870 um, 3057-C | ||
::1.000 um, 5385-B | ::1.000 um, 5385-B | ||
+ | ; Notes | ||
+ | * FESEM resolution is about 1.5 nm @ 15keV (l=h/p) | ||
+ | * 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) | ||
+ | * [http://imagej.nih.gov/ij/ ImageJ] is free image analysis software hosted by NIH | ||
+ | |||
+ | :Rough first analysis of two foils | ||
+ | |||
+ | [[File:thicknessAu5134b.pdf]] | ||
− | == | + | [[File:asym_vs_thickness.pdf]] |
− | + | ||
− | + | ==Divvy-up analysis and summary writing== | |
− | + | ||
− | + | ;Analysis systematics | |
− | + | : Energy and Time Cuts | |
+ | * Suggestion described here [[File:ETCut.pdf]] and take from [ftp://ftp.jlab.org/pub/grames/thesis.pdf Grames thesis, pp.56-73] | ||
+ | : 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== |
Latest revision as of 19:19, 5 February 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.
- Replace viewer with either gridded chromox or YAG crystal, and learn how to use video and image tools
- Make measurement, analysis, data logging as automatic and convenient as possible: Media:DataAnaScreen.pdf Media:DataAnaScreen.pptx
- Improve or standardize our capability for beam characterization (emittance, momentum, energy spread, bunch length)
Sibling thickness measurement status
- FESEM measurements
- profile of each target to sample thickness
- profiles of 2-3 targets multiple foil locations (tests uniformity + preparation technique)
- Sibling list
::0.050 um, 6809-B (done)
- 0.225 um, 7029-B
- 0.350 um, 5613-D (changed from 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
- Notes
- FESEM resolution is about 1.5 nm @ 15keV (l=h/p)
- 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
- Rough first analysis of two foils
Divvy-up analysis and summary writing
- Analysis systematics
- Energy and Time Cuts
- Suggestion described here File:ETCut.pdf and take from Grames thesis, pp.56-73
- 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)