Difference between revisions of "Solid Magnet"
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== How to produce the filed map == | == How to produce the filed map == | ||
| − | use program "Possion Superfish" from LANL | + | use program "Possion Superfish" from LANL ([http://laacg1.lanl.gov/laacg/services/download_sf.phtml home page]), get it from [http://laacg1.lanl.gov/software/PoissonSuperfish/PoissonSuperfish_7.18.exe direct link] or [http://hallaweb.jlab.org/12GeV/SoLID/download/field/PoissonSuperfish_7.18.exe local copy] |
| − | + | * It's a windows program and need installation, it can run with wine in linux or winXP/win7 | |
| − | + | * see including manuals and examples for detailed help. | |
| − | + | * We have been using v7.18, the latest v7.19 came out out in 2011, but the change doesn't affect the program we are using, refer to [http://laacg1.lanl.gov/laacg/services/changes_sf.phtml changelog] | |
Here is a quick summary of howto. | Here is a quick summary of howto. | ||
Revision as of 11:56, 16 July 2012
Contents
CLEO-II
After consideration of the details and availabilities of various coils, the CLEO solenoid was chosen. The information about CLEO II can be found at NIM CLEO II detector(local copy) and IEEE paper focusing the magnet system (local copy)
Eugene has done a great deal of work on the CLEO magnet option, a summary of which can be found here.
- CLEO-II detailed documents and drawings
(Some direct links operation manual, all parts numbered,1,all parts numbered, 2, coil collar
Comparing Magnet
Integral to the SoLID spectrometer design is a large solenoid. Several existing solenoids are under consideration by the collaboration. These include the magnets from Babar, Cleo, CDF and ZEUS
| Babar | CLEO | CDF | ZEUS | Custom | ||
|---|---|---|---|---|---|---|
| Cryostat Inner Radius | 150 cm | 150 cm | 150 cm | 86 cm | 100 cm | |
| Length | 345 cm | 350 cm | 500 cm | 245 cm | 230 cm | |
| Central Field | 1.49 T | 1.5 T | 1.47 T | 1.8 T | 2.68 T | |
| Compact Flux Return | Yes | Yes | No | No | Custom | |
| Current density variation (current/length) | Up and Downstream ends (25%) of coil have 2x current of central 50% | Up and Downstream ends (25%) of coil have 1.04x current of central 50% | No | 25% more current at ends | 50% more current at ends | |
| Magnet Map Update Date | 2011/4/6 | 2011/8/26 | 2011/4/6 | 2011/2/4 | 2011/6/21 | |
| Poisson input deck | BABARv4.am | CLEOv5Wedge.am | CDFv4.am | ZEUSv1.am | SolCustv1.am | |
| Poisson SF7 output | BABARv4.sf7 | CLEOv5Wedge.sf7 | CDFv4.sf7 | ZEUSv1.sf7 | SolCustv1.sf7 | |
| grid info | grid size: 1cm, Rmin 0 Zmin -400, Rmax 400 Zmax 600, R and Z increments: 400 1000 | grid size: 1cm, Rmin 0 Zmin -400, Rmax 400 Zmax 600, R and Z increments: 400 1000 | grid size: 1cm, Rmin 0 Zmin -400, Rmax 400 Zmax 600, R and Z increments: 400 1000 | grid size: 1cm, Rmin 0 Zmin -300, Rmax 300 Zmax 475, R and Z increments: 300 775 | grid size: 1cm, Rmin 0 Zmin -400, Rmax 400 Zmax 600, R and Z increments: 400 1000 | |
| PDVIS target "designed" Location | z=0 | z=0 | z=+50 | z=0 | z=0 | |
| plot by Possion | ||||||
| plot by SF7toGEMCmap.C | ||||||
| Notes: (1) the center of the magnet is taken as the orgin. The target offset for the CDF magnet makes up for the fact that the magnet is longer than the Babar magnet. (2) The upstream pole pieces of the CDF and ZEUS magnets can be angles for SIDIS acceptance needs | ||||||
| Excel File to help make poisson input magnets.xlsx older magnets.xlsx | ||||||
version history
CLEOv5: The CLEO yoke has been updated with more shielding at front end cup for fringe field and tweak end cup with a triangle piece to minimize fields in end cup.
Field Integrals for Baffles
Field integrals for the various magnets are shown above. The different colored points are for different scattering angles spanning the acceptance. The spacing between baffles for all magnets is 30cm, except for Zeus, which is 20.6cm.
talk and note
SoLID Magnet Options (and unstudied calorimeter thoughts)(Paul Reimer)
How to produce the filed map
use program "Possion Superfish" from LANL (home page), get it from direct link or local copy
- It's a windows program and need installation, it can run with wine in linux or winXP/win7
- see including manuals and examples for detailed help.
- We have been using v7.18, the latest v7.19 came out out in 2011, but the change doesn't affect the program we are using, refer to changelog
Here is a quick summary of howto.
- input file ".am" is a text file with regions defined by ploycons.
- produce mesh by AUTOMESH.EXE with input from a ".am" file, output file will be ".T35" with only geometry and material
- use WSFPLOT.EXE to view the ".T35" file to verify the setup.
- then run POISSON.EXE with the ".T35" file which will be added with field.
- use WSFPLOT.EXE to view the ".T35" file with field
- then run SF7.EXE on the ".T35" file, do the field extrapolation for grid with desired ranges and steps, the result is in a txt file "OUTSF7.TXT" which includes a 2D field map.
- run SF7.EXE on the ".T35" file, do the field extrapolation for a line, arc or curve, besides "OUTSF7.TXT", a ".TBL" file is produced and can be directly viewed by TABLPLOT.EXE
- run FORCE.exe with input ".fce" which gives points in a region, the resulting "OUTFOR.TXT" gives the force on the region.
Field map input files
all files are at svn "database_io/solid/field/"
- "babar_transv_3_4.am" BaBar_magnet from_Eugene with center of solenoid at 600cm
- "BaBar_zwzhao.am" BaBar magnet files created by Zhiwen, based on Eugene's file but moved to the center of solenoid to origin
- "BABARv*.am" BaBar magnet by Paul
- "CLEOv*.am" CLEO magnet by Paul
- "CDFv*.am" CDF magnet by Paul
- "ZEUSv*.am" ZEUS magnet by Paul
Field map output files
located at Solid website http://hallaweb.jlab.org/12GeV/SoLID/download/field/
- sf7 files are direct output from possion program
- dat files are conversion from sf7 to GEMC format
refer to Magnetic_Field_Map
