Difference between revisions of "200 kV Polarized Gun"
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| − | This | + | * The 200 kV gun (R30-3 with spherical electrode and 18" gun HVC) was installed in CEBAD during SAD 2023. |
| + | |||
| + | * This gun performed was designed din terms of vacuum, and no field emission at 200 kV. | ||
| + | * It had two problems: | ||
| + | * a) The beam waist is ~ 6 cm downstream of the GaAs wafer, compared to ~ 40 cm from the Tee electrode 14" HVC R28-2 gun operated in CEBAF for years at 130 kV. | ||
| + | * b) It was a not possible to obtain the laser retro-reflection. | ||
| + | * The gun was then removed from the injector and replaced with the R28-2 gun. | ||
| + | * The SAD 2023 links below capture the planning for fixing these problems in thee R30-3 gun (which will then be version R30-4) and for installing it in May 2024. | ||
==200 kV Gun SAD 2023 Installation Links== | ==200 kV Gun SAD 2023 Installation Links== | ||
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* Jan 26, 2022 => [[200 kV Gun - Jan 26, 2022]] | * Jan 26, 2022 => [[200 kV Gun - Jan 26, 2022]] | ||
| − | == Links == | + | ==Links== |
| + | |||
* [https://wiki.jlab.org/ciswiki/index.php/18%22_Photogun_ala_GTS Carlos 18" Gun Page] | * [https://wiki.jlab.org/ciswiki/index.php/18%22_Photogun_ala_GTS Carlos 18" Gun Page] | ||
* Gun Anode - Carlos's update https://wiki.jlab.org/ciswiki/index.php/Anode | * Gun Anode - Carlos's update https://wiki.jlab.org/ciswiki/index.php/Anode | ||
Revision as of 15:36, 9 January 2024
- The 200 kV gun (R30-3 with spherical electrode and 18" gun HVC) was installed in CEBAD during SAD 2023.
- This gun performed was designed din terms of vacuum, and no field emission at 200 kV.
- It had two problems:
- a) The beam waist is ~ 6 cm downstream of the GaAs wafer, compared to ~ 40 cm from the Tee electrode 14" HVC R28-2 gun operated in CEBAF for years at 130 kV.
- b) It was a not possible to obtain the laser retro-reflection.
- The gun was then removed from the injector and replaced with the R28-2 gun.
- The SAD 2023 links below capture the planning for fixing these problems in thee R30-3 gun (which will then be version R30-4) and for installing it in May 2024.
200 kV Gun SAD 2023 Installation Links
- ATLIS => https://tasklists.jlab.org/atlis/tasks/108541
- Marcy's Gantt chart goes here => https://jeffersonlab-my.sharepoint.com/:x:/g/personal/marcy_jlab_org/EUe-xbLpNR1IsV28fyi20FUBC4bUllOnMnAYlXemA7C82Q
- List of photocathodes at end of Phase 1 (5/10/2021) - https://logbooks.jlab.org/entry/3876517
SAD 2023 Planning Meetings
- Feb 20, 2023 => * Carlos SAD schedule Media:Gun swap planning 1 week before and 1 week after SAD start.pptx
- Feb 02, 2022 => Feb 2, 2022 - Group meeting - Group meeting + 200 kV gun
- Jan 26, 2022 => 200 kV Gun - Jan 26, 2022
Links
- Carlos 18" Gun Page
- Gun Anode - Carlos's update https://wiki.jlab.org/ciswiki/index.php/Anode