Difference between revisions of "Spring 2021 - Rebuilding Photogun"

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===Depo chamber : Replace schneedle, fix pucks, opportunistic jobs===
 +
* Vent Depo Chamber
 +
: Pump out NF3, plan to leave leak valve as is
 +
: Vent Depo chamber
 +
: Remove and mic pucks vs. series 30 series dwg, clean, fix [[media:JL0047248 PUCK BODY REV A.pdf]] [[media:MoPuckMount.docx]]
 +
: Replace K source with Alvatec Sb source
 +
: Replace w/ Nitronic schneedle (make sure fit to pucks good first), set alignment into electrode w/o or w/ puck
 +
:: Make (2) SS schneedle w/o silver plating, replace depo chamber silver plated schneedle [[media:ACC2003000-0219 schneedle.pdf]]
 +
:: 4/6 - Shop is fabricating two, trying to have one ready by 4/18
 +
::one from 316 or 316L SS and one from Nitronic 60 https://mis.jlab.org/mis/apps/job_request/mshop/view_request.cfm?request_id=330210&code=1
 +
::* [https://www.hpalloy.com/Alloys/descriptions/NITRONIC60.aspx?kw=%2Bnitronic%20%2B60&cpn=48402520&utm_term=%2Bnitronic%20%2B60&utm_campaign=NITRONIC&utm_source=adwords&utm_medium=ppc&hsa_net=adwords&hsa_tgt=kwd-41394160017&hsa_ad=393453120372&hsa_acc=6124394374&hsa_grp=1610180530&hsa_mt=b&hsa_cam=48402520&hsa_kw=%2Bnitronic%20%2B60&hsa_ver=3&hsa_src=g&gclid=EAIaIQobChMIzJv0vOnp7wIVypyzCh0bPAmCEAAYASAAEgLYn_D_BwE Nitronic 60 data sheet] (Nitronic trademark AK Steel)
 +
::* won't use this ... although probably not a problem, can be mildly magnetic [https://www.associatedsteel.com/stainless-steels/17-4-stainless-steel-pump-shaft-stainless-custom-450-stainless-tgp-mir50/ Mir50] (Mir50 trademark ASC Steel)
 +
: Return 10" flange
 +
: Align mask to puck on heater, fix mask
 +
 
===HV chamber : Replace cathode electrode ===
 
===HV chamber : Replace cathode electrode ===
−
* Electrodes
+
* Electrode Prep Work
 
:*"old" existing electrode here : https://wiki.jlab.org/ciswiki/index.php/CIS-ASY-R28-3
 
:*"old" existing electrode here : https://wiki.jlab.org/ciswiki/index.php/CIS-ASY-R28-3
 
:*"new" niobium electrode here : https://wiki.jlab.org/ciswiki/index.php/CIS-ASY-R28-1
 
:*"new" niobium electrode here : https://wiki.jlab.org/ciswiki/index.php/CIS-ASY-R28-1
−
* 4/8 Leak check good, cathode assembly going to S&A for fiducials
+
:: LgGnNb leak check => done 4/8, Carlos leak tested complete assembly in 1137
−
* 4/7 Walked S&A jobs w/ Chris, agreed to following:
+
:: LgGnNb fiducialize =>
−
: S&A Gun-to-Y as found 4/9, tell us about Y ports, NEG tube and where cathode is pointing, no idea about anode
+
* Alignment Jobs in Cave
−
: We decide if we want to do/move anything and run beam again
+
: Walk job with Carlos & Chris => done 4/7
−
: We decide when to vent HV and Depo, remembering to look for schneedle, clean out Ag flakes
+
: S&A perform an as-found of the Gun through Y chamber => [[media:210414_UITF_15degLine_Summary.xlsx]]
 +
: Matt's "Have-Want" summary pics [[media:210414_HaveWant.pptx]]
 +
: Decide if we want to run beam before venting => don't think so, agree at 4/15 UITF meeting
 +
* Vent HV Chamber to replace cathode
 +
: Start depo jobs first to be ready for manipulator alignment
 
: S&A will fiducialize upstream anode face in UITF
 
: S&A will fiducialize upstream anode face in UITF
 
: S&A will be able to help us align new schneedle where cathode will go
 
: S&A will be able to help us align new schneedle where cathode will go
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: S&A will be able to align cathode/anode combo on whatever line we want (thinking Y ports)
 
: S&A will be able to align cathode/anode combo on whatever line we want (thinking Y ports)
 
: CIS follows up for puck in/out tests, and laser alignment
 
: CIS follows up for puck in/out tests, and laser alignment
−
 
−
===Depo chamber : Replace schneedle, fix pucks, opportunistic jobs===
 
−
* Make (2) SS schneedle w/o silver plating, replace depo chamber silver plated schneedle [[media:ACC2003000-0219 schneedle.pdf]]
 
−
: 4/6 - Shop is fabricating two, trying to have one ready by 4/18
 
−
::one from 316 or 316L SS and one from Nitronic 60 https://mis.jlab.org/mis/apps/job_request/mshop/view_request.cfm?request_id=330210&code=1
 
−
::* [https://www.hpalloy.com/Alloys/descriptions/NITRONIC60.aspx?kw=%2Bnitronic%20%2B60&cpn=48402520&utm_term=%2Bnitronic%20%2B60&utm_campaign=NITRONIC&utm_source=adwords&utm_medium=ppc&hsa_net=adwords&hsa_tgt=kwd-41394160017&hsa_ad=393453120372&hsa_acc=6124394374&hsa_grp=1610180530&hsa_mt=b&hsa_cam=48402520&hsa_kw=%2Bnitronic%20%2B60&hsa_ver=3&hsa_src=g&gclid=EAIaIQobChMIzJv0vOnp7wIVypyzCh0bPAmCEAAYASAAEgLYn_D_BwE Nitronic 60 data sheet] (Nitronic trademark AK Steel)
 
−
::* won't use this ... although probably not a problem, can be mildly magnetic [https://www.associatedsteel.com/stainless-steels/17-4-stainless-steel-pump-shaft-stainless-custom-450-stainless-tgp-mir50/ Mir50] (Mir50 trademark ASC Steel)
 
−
* NF3 leak value => leave as-is
 
−
* align mask, fix w/ two set screws
 
−
* replace K source with Alvatec Sb source?
 
−
* Inspect and mic pucks against series 30 series dwg [[media:JL0047248 PUCK BODY REV A.pdf]] [[media:MoPuckMount.docx]]
 
  
 
===Other jobs===
 
===Other jobs===
−
* Re-align HV chamber before venting?  => sent request to Gould
+
* Improve stalk heater driver motion => done, https://logbooks.jlab.org/entry/3871902
−
* (done) Repair stalk heater driver => https://logbooks.jlab.org/entry/3871902
 

Revision as of 06:39, 14 April 2021

Depo chamber : Replace schneedle, fix pucks, opportunistic jobs

  • Vent Depo Chamber
Pump out NF3, plan to leave leak valve as is
Vent Depo chamber
Remove and mic pucks vs. series 30 series dwg, clean, fix media:JL0047248 PUCK BODY REV A.pdf media:MoPuckMount.docx
Replace K source with Alvatec Sb source
Replace w/ Nitronic schneedle (make sure fit to pucks good first), set alignment into electrode w/o or w/ puck
Make (2) SS schneedle w/o silver plating, replace depo chamber silver plated schneedle media:ACC2003000-0219 schneedle.pdf
4/6 - Shop is fabricating two, trying to have one ready by 4/18
one from 316 or 316L SS and one from Nitronic 60 https://mis.jlab.org/mis/apps/job_request/mshop/view_request.cfm?request_id=330210&code=1
  • Nitronic 60 data sheet (Nitronic trademark AK Steel)
  • won't use this ... although probably not a problem, can be mildly magnetic Mir50 (Mir50 trademark ASC Steel)
Return 10" flange
Align mask to puck on heater, fix mask

HV chamber : Replace cathode electrode

  • Electrode Prep Work
LgGnNb leak check => done 4/8, Carlos leak tested complete assembly in 1137
LgGnNb fiducialize =>
  • Alignment Jobs in Cave
Walk job with Carlos & Chris => done 4/7
S&A perform an as-found of the Gun through Y chamber => media:210414_UITF_15degLine_Summary.xlsx
Matt's "Have-Want" summary pics media:210414_HaveWant.pptx
Decide if we want to run beam before venting => don't think so, agree at 4/15 UITF meeting
  • Vent HV Chamber to replace cathode
Start depo jobs first to be ready for manipulator alignment
S&A will fiducialize upstream anode face in UITF
S&A will be able to help us align new schneedle where cathode will go
S&A will be able to align cathode to anode
S&A will be able to align cathode/anode combo on whatever line we want (thinking Y ports)
CIS follows up for puck in/out tests, and laser alignment

Other jobs

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