View source for Solid Magnet

[http://hallaweb.jlab.org/wiki/index.php/SoLID Return to SoLID main page

= magnet candidate=

== CLEO-II ==

* www [http://en.wikipedia.org/wiki/CLEO_(particle_detector) CLEO wikipedia], [http://www.lepp.cornell.edu/Research/EPP/CLEO/ CLEO detector], [http://www.lns.cornell.edu/public/lab-info/coil.html coil], [http://www.lns.cornell.edu/public/lab-info/cryo-system.gif cryo pic]

* publication [http://www.sciencedirect.com/science/article/pii/0168900292907705 NIM CLEO II detector]([http://hallaweb.jlab.org/12GeV/SoLID/download/cleo_manual/CLEO_II_NIM.pdf local copy]) and [http://ieeexplore.ieee.org/iel1/23/2078/00057361.pdf?arnumber=57361 IEEE paper focusing the magnet system] ([http://hallaweb.jlab.org/12GeV/SoLID/download/cleo_manual/CLEO_magnet_IEEE.pdf local copy])

* [http://hallaweb.jlab.org/12GeV/SoLID/download/cleo_manual/ photos, documents and drawings]
**  Some direct links [http://hallaweb.jlab.org/12GeV/SoLID/download/cleo_manual/Oxford__Operating_Manual_for_CLEO_II_Superconducting_Magnet.pdf operation manual], [http://hallaweb.jlab.org/12GeV/SoLID/download/cleo_manual/20120314%20Accelerator%20SCANS/Roll%202%20-%20Laboratory%20of%20Nuclear%20Studies/6052-303%20-Sh%2003.pdf all parts numbered 1],[http://hallaweb.jlab.org/12GeV/SoLID/download/cleo_manual/20120314%20Accelerator%20SCANS/Roll%202%20-%20Laboratory%20of%20Nuclear%20Studies/6052-303%20-Sh%2002.pdf all parts numbered 2], [http://hallaweb.jlab.org/12GeV/SoLID/download/cleo_manual/20120314%20Accelerator%20SCANS/Roll%202%20-%20Laboratory%20of%20Nuclear%20Studies/6052-303%20-Sh%2013.pdf coil collar]

== BaBar ==

* www [http://en.wikipedia.org/wiki/BaBar_experiment BaBar wikipedia], [http://www.slac.stanford.edu/BFROOT/www/doc/workbook/detector/detector.html BaBar detector], [http://www.slac.stanford.edu/BFROOT/www/Detector/Magnet/Magnet.html magnet(SLAC main)],[http://hepunx.rl.ac.uk/BFROOT/www/Detector/Magnet/Magnet.html magnet(RAL mirror)] [http://www.slac.stanford.edu/BFROOT/www/doc/TDR/tdr_ch09_magnet.ps.gz magnet TDR]

* publication [http://www.sciencedirect.com/science/article/pii/S0168900201020125 NIM BaBar detector]([http://hallaweb.jlab.org/12GeV/SoLID/download/babar_manual/info/1-s2.0-S0168900201020125-main-1.pdf local copy]), [http://hallaweb.jlab.org/12GeV/SoLID/download/babar_manual/info/Fringe%20Field.pdf NIM fringe field study], [http://hallaweb.jlab.org/12GeV/SoLID/download/babar_manual/info/The%20BaBar%20superconducting%20coil---%20Design,%20construction%20and%20test.pdf Nuc.Phy.B coil]

* [http://hallaweb.jlab.org/12GeV/SoLID/download/babar_manual/ photos, documents and drawings], 
** some direct links [http://hallaweb.jlab.org/12GeV/SoLID/download/babar_manual/info/Field%20Measurements%20in%20the%20BaBar%20Solenoid.pdf field mapping], [http://hallaweb.jlab.org/12GeV/SoLID/download/babar_manual/info/Spencer_C_SLAC.pdf field simulation talk]

=talk and note=

there are more talks at [[Meeting_solid_coll |collaboration meeting page]]

== study from 2016 ==

Jay Benesch's note

https://solid.jlab.org/cgi-bin/private/ShowDocument?docid=2

== study by 2012 ==

* Zhiwen's update on base on Eugen's study. it leads to CLEOv8 [http://hallaweb.jlab.org/12GeV/SoLID/download/field/talk/SoLID_CLEO_zwzhao_201207.pptx pptx] [http://hallaweb.jlab.org/12GeV/SoLID/download/field/talk/SoLID_CLEO_zwzhao_201207.pdf pdf]

* [https://userweb.jlab.org/~gen/jlab12gev/cleo_mag/ Eugene's study of CLEO-II adaption for SoLID]

* [http://hallaweb.jlab.org/12GeV/SoLID/meeting_coll/2011_01/SoLID_mtg_Jan.pptm SoLID Magnet Options (and unstudied calorimeter thoughts)](Paul Reimer)

= SoLID magnet design = 

==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 [http://www.slac.stanford.edu/BF/ Babar], [http://w4.lns.cornell.edu/Research/EPP/CLEO/ Cleo], [http://www-cdf.fnal.gov/ CDF] and [http://www-zeus.desy.de/ ZEUS]

{| Border = "1"
!
! 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
| 2012/7/27
| 2011/4/6
| 2011/2/4
| 2011/6/21
|-
| Poisson input deck
| [https://jlabsvn.jlab.org/svnroot/solid/solid_gemc/database_io/field/BABARv4.am BABARv4.am]
| [https://jlabsvn.jlab.org/svnroot/solid/solid_gemc/database_io/field/CLEOv8.am CLEOv8.am] [https://jlabsvn.jlab.org/svnroot/solid/solid_gemc/database_io/field/CLEOv8.fce CLEOv8.fce]
| [https://jlabsvn.jlab.org/svnroot/solid/solid_gemc/database_io/field/CDFv4.am CDFv4.am]
| [https://jlabsvn.jlab.org/svnroot/solid/solid_gemc/database_io/field/ZEUSv1.am ZEUSv1.am]
| [https://jlabsvn.jlab.org/svnroot/solid/solid_gemc/database_io/field/SolCustv1.am SolCustv1.am]
|-
| Poisson SF7 output
|[http://hallaweb.jlab.org/12GeV/SoLID/download/field/BABARv4.sf7 BABARv4.sf7]
|[http://hallaweb.jlab.org/12GeV/SoLID/download/field/CLEOv8.sf7 CLEOv8.sf7]
|[http://hallaweb.jlab.org/12GeV/SoLID/download/field/CDFv4.sf7 CDFv4.sf7]
|[http://hallaweb.jlab.org/12GeV/SoLID/download/field/ZEUSv1.sf7 ZEUSv1.sf7]
|[http://hallaweb.jlab.org/12GeV/SoLID/download/field/SolCustv1.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 -600,   Rmax 500 Zmax 600,  R and Z increments:     500     1200
| 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=+10
| z=+10
| z=+50
| z=0
| z=0
|-
| plot by Possion
| [[Image:BABARv4.png|thumb|75px|center]]
| [[Image:CLEOv8.png|thumb|75px|center]]
| [[Image:CDFv4.png|thumb|75px|center]]
| [[Image:ZEUSv1.png|thumb|75px|center]]
| [[Image:Solcustv1.png|thumb|75px|center]]
|-
| plot by SF7toGEMCmap.C
| [[Image:BABARv4_SF7map.png|thumb|75px|center]]
| [[Image:CLEOv5_SF7map.png|thumb|75px|center]]
| [[Image:CDFv4_SF7map.png|thumb|75px|center]]
| [[Image:ZEUSv1_SF7map.png|thumb|75px|center]]
| [[Image:SolCustv1_SF7map.png|thumb|75px|center]]
|
|-
| align="center" colspan="6" | 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
|-
| align="center" colspan="6" | Excel File to help make poisson input [http://hallaweb.jlab.org/12GeV/SoLID/download/field/magnets.xlsx magnets.xlsx]  [https://jlabsvn.jlab.org/svnroot/solid/solid_gemc/database_io/field/magnets.xlsx older magnets.xlsx older version]
|}

== version history ==
CLEOv8 update with realistic CLEO-II design and same magnet for both PVDIS and SIDIS

CLEOv6_PVDIS and CLEOv6_SIDIS update with CLEO separated yoke

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.

BABARv4 has SIDIS endcap, PVDIS can fit but not optimized because the endcap nose doesn't extend long enough to the coil region.

=Field Integrals for Baffles=

[[Image:Solidfields.png]]

Fields at fixed radius

[[Image:Solidfieldint.png|400px]] [[Image:Solidfieldintratio.png|400px]]

Field integrals and ratios for the various magnets are shown above.  The integrals assume a trajectory of 28&deg; beginning at the center of the target.  The efficiencies for the baffle designs scale with the field integral shown [[Baffle Design|here]].

= Poisson Superfish Howto  =

== How to produce the filed map ==
 use program "Poisson Superfish" from LANL ([http://laacg.lanl.gov/laacg/services/download_sf.phtml home page]), get it from  [http://laacg.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 in 2013, but the change doesn't affect the program we are using, refer to [http://laacg.lanl.gov/laacg/services/changes_sf.phtml 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
* "CLEOv*.am" CLEO magnet
* "CDFv*.am" CDF magnet
* "ZEUSv*.am" ZEUS magnet

== Field map output files ==
located at Solid website http://hallaweb.jlab.org/12GeV/SoLID/download/field/
* sf7 files are direct output from poissonsuperfish program
* dat files are conversion from sf7 to GEMC format
refer to [[Magnetic_Field_Map]]

----

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