Difference between revisions of "Spring 2021 - Rebuilding Photogun"

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:*"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
* leak test large grain Nb cathode/ceramic/flange assembly : << carlos' logbook entry goes here >>
+
* 4/8 Leak check good, cathode assembly going to S&A for fiducials
* S&A jobs (will walk with Chris Gould 4/7 @ 9am UITF)
+
* 4/7 Walked S&A jobs w/ Chris, agreed to following:
:*fiducialize Nb cathode to 10" flange (old method glued fiducials)
+
: 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
:*(maybe) fiducialize existing 10" flange to HV chamber
+
: We decide if we want to do/move anything and run beam again
:*fiducialize anode to HV chamber
+
: We decide when to vent HV and Depo, remembering to look for schneedle, clean out Ag flakes
:*align cathode to anode
+
: S&A will fiducialize upstream anode face in UITF
:*align LM to cathode (after venting depo)
+
: S&A will be able to help us align new schneedle where cathode will go
:*align HV to chamber Y
+
: S&A will be able to align cathode to anode
* re-align laser for retro-reflection
+
: S&A will be able to align cathode/anode combo on whatever line we want (thinking Y ports)
* vent HV chamber, remove cathode electrode, searching for puck tab
+
: CIS follows up for puck in/out tests, and laser alignment
  
 
===Depo chamber : Replace schneedle, fix pucks, opportunistic jobs===
 
===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]]
 
* Make (2) SS schneedle w/o silver plating, replace depo chamber silver plated schneedle [[media:ACC2003000-0219 schneedle.pdf]]
:*fabricate one from 304 SS and one from Nitronic 60 https://mis.jlab.org/mis/apps/job_request/mshop/view_request.cfm?request_id=330210&code=1
+
: 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)
 
::* [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)
::* [https://www.associatedsteel.com/stainless-steels/17-4-stainless-steel-pump-shaft-stainless-custom-450-stainless-tgp-mir50/ Mir50] (Mir50 trademark ASC 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
 
* NF3 leak value => leave as-is
 
* align mask, fix w/ two set screws
 
* align mask, fix w/ two set screws

Revision as of 11:02, 8 April 2021

HV chamber : Replace cathode electrode

  • Electrodes
  • 4/8 Leak check good, cathode assembly going to S&A for fiducials
  • 4/7 Walked S&A jobs w/ Chris, agreed to following:
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
We decide if we want to do/move anything and run beam again
We decide when to vent HV and Depo, remembering to look for schneedle, clean out Ag flakes
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

Depo chamber : Replace schneedle, fix pucks, opportunistic jobs

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)

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