Difference between revisions of "Pol He-3 Target Information GEn"

From Hall A Wiki
Jump to: navigation, search
(→‎Target Operator Instructions)
(→‎Production Target Cell Information)
 
(48 intermediate revisions by 3 users not shown)
Line 1: Line 1:
 +
[[File:Target.png|thumb|625px|right|Cell "Talisker" mounted in target enclosure]]
 +
== Experiment Information ==
 +
The GEn experiment is determining the electric form factor of the neutron to high Q<sup>2</sup> by measuring the ratio of the electric form factor of the neutron to proton via recoil polarimetry. The planned kinematic points have changed slightly from the original proposal; however, the impact of these measurements remains intact. The new kinematics are shown Figure 1 along with the expected uncertainty compared to the originally proposed kinematics. These error bars include current estimate of target and datector performance.
 +
 +
*[https://hallaweb.jlab.org/experiment/SBS/GEn/GEn_Website.html#generic GEn-II Proposal]
 +
*[https://hallaweb.jlab.org/experiment/SBS/GEn/GEn_Website.html#generic GEn-II ERR]
 +
 
== Target Operator Instructions ==
 
== Target Operator Instructions ==
−
* PolHe3 Target Training Slides: [https://hallcweb.jlab.org/experiments/PolHe3-2019/PolHe3_Target_Training_30Jul2020.pdf]
+
* New PolHe3 Target Training Slides [https://sbs.jlab.org/DocDB/0003/000330/008/TO_training%20slides_halla.pdf]
−
* PNMR Training slides:
+
* Old PolHe3 Target Training Slides [https://hallcweb.jlab.org/experiments/PolHe3-2019/PolHe3_Target_Training_30Jul2020.pdf]
−
* How to bring up relevant target GUIs:
+
* PNMR Training slides
−
* Polarized He3 Target Operational Restrictions (raster, beam current limits, etc):
+
* [[How to bring up relevant target GUIs]]
−
* Procedure for Moving Between Target Cells:
+
* Polarized He3 Target Operational Restrictions (raster, beam current limits, etc)
−
* Reference Cell Fill Procedure:
+
* [[Procedure for Moving Between Target Cells]]
 +
* Reference Cell Fill Procedure
 +
* [[Helmholtz Coils Settings for Different Magnet Configurations]]
  
 
== Checklists ==
 
== Checklists ==
−
* [[Checklist before starting Target Work inside the Enclosure]]  
+
* [[Checklist before starting Target Work inside the Enclosure]] REVIEW THIS PAGE
−
* [[Backout Checklist after Hall Access for Target Work ]]
+
* [[Backout Checklist after Hall Access for Target Work ]] REVIEW THIS PAGE
−
* [[Backout Checklist after Target Work inside Enclosure ]]
+
* [[Backout Checklist after Target Work inside Enclosure ]] REVIEW THIS PAGE
 +
* [[Checklist for each shift]]
  
−
== Expert Information ==
+
== Target Polarization ==
−
=== Reference Cell ===
+
−
* [[Media:Reference_cell.pdf|How to install/remove a reference cell]]
+
−
* [[Media:EPR_photodiode_replacement.pdf|EPR Photodiode Replacement Procedure]]
+
−
* [https://logbooks.jlab.org/entry/3746573 Reference Cell Summary Document]
+
−
* [[Media:SIMPLIFIED REFERENCE CELL PROCEDURES.pdf|Reference Cell Fill Procedure (PDF)]] ([[Media:SIMPLIFIED REFERENCE CELL PROCEDURES.docx|docx]])
+
  
−
* Pressure calibration data:
+
[[Measurements]] UPDATE FOR GEn!!
−
** EPICS data:
+
 
−
*** Vacuum readback: ADC channel 7  (raw: HcHPE1313ACh7; "calibrated": polhe3:CellVacuum )
+
== Target Meetings ==
−
*** Pressure readback: ADC channel 8 (raw: HcHPE1313ACh8; "calibrated": polhe3:CellPressure )
+
 
−
** 04 Dec 2019 : [https://logbooks.jlab.org/entry/3746573 Reference Cell Summary Document] (These calibrations were done '''before''' a 1 uF cap was added on 18 Dec 2019 [https://logbooks.jlab.org/entry/3755882])
+
[[Weekly Meetings]]
−
** 14 Feb 2020 : [https://logbooks.jlab.org/entry/3783817 Reference Cell pressure calibration (14 Feb 2020)]
+
 
−
*** A little more information: https://logbooks.jlab.org/entry/3788269
+
== Expert Instructions ==
 +
=== Target Cell ===
 +
* [https://sbs.jlab.org/cgi-bin/DocDB/private/ShowDocument?docid=277 Instructions for mounting new cell]
 +
 
 +
=== Reference Cell ===
 +
* [https://hallaweb.jlab.org/wiki/images/e/e2/Ref._Cell._Operating_Procedures_GEN-II.pdf Operating Procedures]
  
 
=== Cooling Jet Alignment ===
 
=== Cooling Jet Alignment ===
−
Alignment jigs and drawings are stored on the box labeled 'Averett 3He Reference Cell Pts'. And the box is on the floor underneath the Hall C counting house printer.
 
  
 
=== Pol He3 Field Mapping Data ===
 
=== Pol He3 Field Mapping Data ===
−
* [[Pol He3 Field Mapping Data]]
 
−
* [https://docs.google.com/spreadsheets/d/e/2PACX-1vTqbYehkZqdvYdIK-cLOVyKruMwb2Iz2P8VOG18bx2UlJSTLjgZKvkS33gsfxtFNcj-Kq-uXj-JTkw1/pubhtml Field Correction Settings for A1N]
 
−
* [[Media:Target_Field_Coils_D2N.pdf|Field Correction Settings for D2N]] ([https://userweb.jlab.org/~jixie/A1N/FieldRunPlan/Target_Field_Coils_D2N.pdf Original])
 
  
 
=== Pol He3 Field Map from TOSCA simulation ===
 
=== Pol He3 Field Map from TOSCA simulation ===
−
* [[TOSCA simulation for Pol He3 Field]]
 
  
 
=== Circular Raster Information ===
 
=== Circular Raster Information ===
−
* [https://www.jlab.org/indico/event/299/session/0/contribution/4/material/slides/ Raster Status Presentation]  Mark J., Bob M. (Dec 10, 2018 Collaboration Meeting)
 
−
 
−
=== Reboot Switches ===
 
−
* [[Reboot Switch Operation]] --How to use reboot switches
 
−
* [[hcreboot5]] --Devices in the Pol He3 Rack behind the Green Wall
 
−
* [[hcreboot6]] --Devices in the two racks under the pivot
 
−
* [[hcreboot7]] --Devices in the two racks under the pivot
 
  
 
=== Reset Target Ladder Motion Control ===
 
=== Reset Target Ladder Motion Control ===
−
[[Pol He-3 Target Motion Reset]]
+
[https://hallaweb.jlab.org/wiki/index.php/Iocha26_reboot_information Reboot instructions]
  
 
=== Cable/RTD/Signal Maps ===
 
=== Cable/RTD/Signal Maps ===
−
'''NOTE: If you update a map below'''
 
−
  Click on a the previous hclog entry and either add a comment
 
−
  pointing to your new entry, or use the 'Follow-up' link on the
 
−
  old entry to make a new entry. That will make it easier to track
 
−
  when/why things change.
 
−
* Note: There is a dictionary of EPICS PVs with descriptions at
 
−
** ~coda/coda/scripts/EPICS_logging/polhe3-epics.txt
 
−
* Laser Fiber End RTDs:
 
−
** Hardware notes: https://logbooks.jlab.org/entry/3747838
 
−
** Final Map: https://logbooks.jlab.org/entry/3747950
 
−
* RTDs on cell:
 
−
** Visual gauge photo and PV map: https://logbooks.jlab.org/entry/3747509  (12/06/2019 - 03:48)
 
−
** RTD head settings: https://logbooks.jlab.org/entry/3747508
 
  
 
==== Fiber RTD hardware trip points ====
 
==== Fiber RTD hardware trip points ====
−
* Fire Safety RTDs
 
−
** HcFiberTemp0, HcFiberTemp1
 
−
** max measured about 32C
 
−
** '''set trip to 36C'''
 
−
 
−
* Fiber Temperature RTDs
 
−
** HcFiberTemp4+  (except for 12, 14 below)
 
−
** Max measured of about 32C
 
−
** '''set trip to 46C''' (as of Jan 14, 2020 -- '''will set to 36C''' during next downtime)
 
−
 
−
* HcFiberTemp12, 14
 
−
** Max measured of 40C
 
−
** '''set trip to 46C'''
 
−
 
−
<div id="collapse-pre-one" class="mw-collapsible mw-collapsed">
 
−
<div class="mw-collapsible-toggle toccolours" style="float: none;">
 
−
  <div class="mw-collapsible-toggle-row">
 
−
  <div class="mw-collapsible-toggle-header"><big>'''Reset instructions for RTD HW trip points &bull; Expert only (Brad or Ethan) [click]'''</big></div>
 
−
  </div>
 
−
</div>
 
−
<div class="mw-collapsible-content">
 
−
Address 0xF6
 
−
  FiberTemp0-1:  (and the unused 2, 3)
 
−
    Fire safety RTDs (max 36)
 
−
Address 0xF5
 
−
  FiberTemp4--7
 
−
  * max 36
 
−
Address 0xF3
 
−
  FiberTemp8--11
 
−
  * max 36
 
−
Address 0xF4
 
−
  FiberTemp12-15
 
−
  * max 46 due to 12, 14
 
−
 
−
'''NOTE''': power cycling the acromag controller below will trip the laser interlock!
 
−
 
−
* Set the hardware trip limits
 
−
% ssh pi@polhe3pi2  ('hccuser' password)
 
−
% cd Documents
 
−
% scls  # select 'acromag' entry, then type Ctrl-C to kill the program
 
−
# Set the limits
 
−
% for f in 0xf3 0xf5 0xF6; do ./setupAcro -l 36 -a $f; done
 
−
% for f in 0xf4; do ./setupAcro -l 46 -a $f; done
 
−
# Reboot the acromag controller using hcreboot6
 
−
# Then restart the software by (for example) running bash again
 
−
% bash
 
−
 
−
* Verify that the stripcharts are updating again and close the terminal window.
 
−
</div>
 
  
 
==== PolHe3 Alarm Handler defaults ====
 
==== PolHe3 Alarm Handler defaults ====
−
These can be reset this way:
 
−
  % ssh cvxwrks@cdaql1
 
−
  % cd alarm_handler_polhe3
 
−
  % ./set_polhe3_defaults
 
−
 
−
Type in the number for the fields you wish to reset and hit return.
 
  
 
== Reference Cell Information ==
 
== Reference Cell Information ==
−
* [[Media:A1n_d2n_Ref_cell_windows.pdf|Reference Cell Window Thicknesses]] (As posted to the Analysis Log here: https://hallcweb.jlab.org/elogs/A1n-d2n+Combined+Analysis/59 )
+
* Documents from Todd?
  
 
== Production Target Cell Information ==
 
== Production Target Cell Information ==
  
−
=== PolHe3 Polarization Citation/Reference Link ===
+
=== General Specifications for Target Cells ===
−
Final Cell polarizations and supporting documentation is (will be) on the Hall C DocDB
+
*[https://sbs.jlab.org/DocDB/0000/000026/001/sbs_july_2018_collab_mtg_target_v3.pdf Information from 2018 SBS collaboration meeting]
−
  https://hallcweb.jlab.org/doc-private/ShowDocument?docid=1182
+
−
Use that URL as a citation/reference in papers.
+
  
−
=== Additional Details ===
+
documents from Gordon?
−
[[Media:cell_polarizations.pdf|Nominal Cell Status summary slide]]
+
−
 
+
−
*; Any cells that are production ready need to be flagged as such
+
−
 
+
−
*; Any cells that have seen beam should be flagged with the date range
+
−
* Production cell target chamber wall thickness measurement location (JLab Measurements)
+
−
[[image:Production_Cell_Wall_Thickness.png]]
+
−
* Production cell target chamber wall thickness measurement location (UVa Measurements)
+
−
[[image:UVa_wall_position_defs.jpg|600px]]
+
−
 
+
−
=== Currently Installed Cell ===
+
−
*; Briana
+
−
** '''Re-'''Installed in target: 08/21/2020
+
−
** Originally Installed in target: Cell for Initial testing 12/15/2019 to 01/04/2020
+
−
** Characterization Document: [[Media:Production_Cell_Info_-_Cell_Briana.pdf]]
+
  
 
=== Cells Being Readied for Installation ===
 
=== Cells Being Readied for Installation ===
−
*; Tommy -- next cell; being remounted
 
−
** Installed in target:  (Soon ready for install; Planned for next Production Cell)
 
−
** Characterization Document: [[Media:Production_Cell_Info_-_Cell_Tommy.pdf]]
 
  
−
*; Butterball
+
*; Pristine
−
** Installed in target:  (Future Production Cell)
+
** Undergoing tests at UVA
−
** Characterization Document: [[Media:Production_Cell_Info_-_Cell_Butterball.pdf]]
+
 
 +
*; Tiger
 +
** Undergoing tests at UVA
  
 
=== Older Installed Cells ===
 
=== Older Installed Cells ===
−
*; Austin
+
*; Ukraine
−
** Installed in target: 03/20/2020 to 8/21/2020
+
** Installed in target enclosure: 10/03/2022 to 10/13/2022
−
** Characterization Document: [[Media:Production_Cell_Info_-_Cell_Austin.pdf]]
+
** Used for commissioning
 +
** Characterization document: [https://hallaweb.jlab.org/wiki/index.php/Pol_He-3_Target_Information_GEn/CellUkraine]
 +
 
 +
*; Hunter
 +
** Installed in target enclosure: 10/14/2022 to *******
 +
** Installed in target enclosure:
 +
** Used for commissioning
 +
** Used for kinematics points
 +
** Characterization document: [https://hallaweb.jlab.org/wiki/index.php/Pol_He-3_Target_Information_GEn/CellHunter]
  
−
*; Big Brother
+
*; Windmill
−
** Installed in target: 02/12/2020 to 03/13/2020
+
** Installed in target enclosure:
−
** Characterization Document: [[Media:Production_Cell_Info_-_Cell_Bigbrother.pdf]]
+
** Used for kinematics points
 +
** Characterization document: [https://hallaweb.jlab.org/wiki/index.php/Pol_He-3_Target_Information_GEn/CellWindmill]
  
−
*; Dutch
+
*; Fringe
−
** Installed in target: 01/04/2020 to 02/10/2020
+
** Installed in target enclosure:
−
** Characterization Document: [[Media:Production_Cell_Info_-_Cell_Dutch.pdf]]
+
** Used for kinematics points
 +
** Characterization document: [https://hallaweb.jlab.org/wiki/index.php/Pol_He-3_Target_Information_GEn/CellFringe]
  
−
*; Fulla
+
*; Chicago
−
** Installed in target: November 2019 (Backup Cell)
+
** Installed in target enclosure:
−
** Characterization Document: [[Media:Production_Cell_Info_-_Cell_Fulla.pdf]]
+
** Used for kinematics points
 +
** Characterization document: [https://hallaweb.jlab.org/wiki/index.php/Pol_He-3_Target_Information_GEn/CellChicago]
  
 
=== Addition Documentation ===
 
=== Addition Documentation ===
−
*  Spreadsheet from Chris Jantzi (July 8, 2020) : [[Media:A1n Cell Characteristics - 08Jul2020.xlsx]]
+
information on study of magnetic field alignment in cells?
−
* [[Media:Target_Summary_-_Wall_Thickness.xlsx]]
+
−
* Mingyu Chen (March 22, 2021): [[Media:Production_Cell_Info_-_Pumping_Chamber_Wall_Thickness.pdf]]
+
−
* "Frequency shifts in the EPR spectrom of 39K due to spin-exchange collisions with polarized 3He and precise 3He polarimetry" (Kappa_0) Paper: [https://arxiv.org/abs/2109.04375 arXiv link], [[Media:kappa_0-draft-16Oct2021.pdf|Local copy (16Oct2021)]]
+
  
 
== Additional Documentation ==
 
== Additional Documentation ==
−
* [https://hallcweb.jlab.org/wiki/index.php/kepco Info on Kepco Power Supplies]
 
−
* [https://hallaweb.jlab.org/wiki/index.php/Target_Lab_Main EEL Target Lab Main Page]
 
−
* [https://hallaweb.jlab.org/wiki/index.php/Hall_A_He3_Polarized_Target 2008/9 Hall A Pol 3He Target Page]
 
  
 
=== Target CAD Files/Photos ===
 
=== Target CAD Files/Photos ===
Line 193: Line 110:
  
 
* Selected Target Shop Drawings
 
* Selected Target Shop Drawings
−
** [[Media:67507-00047.pdf|Target Ladder]]
 
−
** [[Media:A060100304-1101.pdf|Carbon Foil Mount Plate]]
 
−
*** ''7 foils spaced 2.625" (6.667 cm) apart''
 
−
*** ''Upstream entrance window should be at z=-30.0cm''  (based off 67507-00017-1.pdf, 67507-00014.pdf, 67507-00024-1.pdf)
 
−
** [[Media:67507-00051.pdf|Target Oven]]
 
−
** [[Media:67507-00080-1.pdf|Platform and coils]]
 
−
** [[Media:67507-00087-1.pdf|Carbon Foils]]
 
  
−
* [https://drive.google.com/drive/folders/1Fgofz97IFzQ7719Az3cl8vAUy3tfbaQZ?usp=sharing Photos of Target Setup] (google drive link)
+
*[https://hallaweb.jlab.org/wiki/images/8/8f/OvenAssymblyPictures.pdf Oven Assembly Pictures]
−
* [https://userweb.jlab.org/~metzger/HALL%20C%20A1N%20D2N%20UPDATED%20DRAWINGS/ CAD Models from Bert]
+
 
−
* [https://drive.google.com/drive/folders/19NzT8S-xV6y6AcHtqN6FyNPesMLzz0wy?usp=sharing JT files]
+
=== Target Ladder ===
 +
 
 +
* [https://sbs.jlab.org/DocDB/0003/000323/003/carbon_foil_GEn.pdf Information on Carbon Foils]
 +
 
 +
=== Holding Field ===
 +
 
 +
* [https://sbs.jlab.org/DocDB/0002/000282/003/dflay_corr-opera-studies_GEn.pdf GEn Corrector Magnet Settings]
 +
 
 +
=== Safety Documents ===
 +
 
 +
* [https://sbs.jlab.org/DocDB/0003/000319/001/operational_safety_procedure_form_142218.pdf OSP for Magnetic Field Measurments]
 +
 
 +
* [https://sbs.jlab.org/DocDB/0003/000309/001/operational_safety_procedure_form_136887.pdf OSP for Polarized He3 Target]
  
 
== Manuals ==
 
== Manuals ==
−
* [[Target Field and Kepco Info|Kepco Power supply (and target Field) information]]
 
−
** [[Media:KEPCO.pdf|Note on KEPCO power supplies]]
 
−
* [[Media:SR844m.pdf|SR844 Stanford Research Systems RF Lockin Amplifier Manual]]
 
−
* [[Media:gpib.pdf|GPIB-ENET/100 Manual]]
 
−
* [[Media:190284-A-MNL-C.pdf|Perkin Elmer 7265 Lockin Manual]]
 
−
* [https://logbooks.jlab.org/entry/3745303 Raytum Laser configuration file (HCLOG 3745303]
 
−
* [[Media:iSeriesCNi32_RTD_Readout.pdf|iSeries CNi32 Temperature controller (4-wire RTD)]]
 

Latest revision as of 11:08, 31 March 2023

Cell "Talisker" mounted in target enclosure

Experiment Information

The GEn experiment is determining the electric form factor of the neutron to high Q2 by measuring the ratio of the electric form factor of the neutron to proton via recoil polarimetry. The planned kinematic points have changed slightly from the original proposal; however, the impact of these measurements remains intact. The new kinematics are shown Figure 1 along with the expected uncertainty compared to the originally proposed kinematics. These error bars include current estimate of target and datector performance.

Target Operator Instructions

Checklists

Target Polarization

Measurements UPDATE FOR GEn!!

Target Meetings

Weekly Meetings

Expert Instructions

Target Cell

Reference Cell

Cooling Jet Alignment

Pol He3 Field Mapping Data

Pol He3 Field Map from TOSCA simulation

Circular Raster Information

Reset Target Ladder Motion Control

Reboot instructions

Cable/RTD/Signal Maps

Fiber RTD hardware trip points

PolHe3 Alarm Handler defaults

Reference Cell Information

  • Documents from Todd?

Production Target Cell Information

General Specifications for Target Cells

documents from Gordon?

Cells Being Readied for Installation

  • Pristine
    • Undergoing tests at UVA
  • Tiger
    • Undergoing tests at UVA

Older Installed Cells

  • Ukraine
    • Installed in target enclosure: 10/03/2022 to 10/13/2022
    • Used for commissioning
    • Characterization document: [3]
  • Hunter
    • Installed in target enclosure: 10/14/2022 to *******
    • Installed in target enclosure:
    • Used for commissioning
    • Used for kinematics points
    • Characterization document: [4]
  • Windmill
    • Installed in target enclosure:
    • Used for kinematics points
    • Characterization document: [5]
  • Fringe
    • Installed in target enclosure:
    • Used for kinematics points
    • Characterization document: [6]
  • Chicago
    • Installed in target enclosure:
    • Used for kinematics points
    • Characterization document: [7]

Addition Documentation

information on study of magnetic field alignment in cells?

Additional Documentation

Target CAD Files/Photos

  • Selected Target Shop Drawings

Target Ladder

Holding Field

Safety Documents

Manuals

Retrieved from "https://hallaweb.jlab.org/wiki/index.php?title=Pol_He-3_Target_Information_GEn&oldid=44367"