Vacuum 12GeV Hardening and Improvements Documentation

Vacuum: 12GeV Hardening Anthony DiPette Installation / Vacuum Group Leader 7/16/2015

Vacuum: 12GeV Hardening Vacuum Improvements & Status Synchrotron Radiation Effects Vacuum Spares Page 2

Vac Improvements - Linac Viewer Bellows 9 of 11 Done Viewer Location 1L02 1L06 1L10 1L14 1L18 1L22 2L02 2L06 2L10 2L14 2L18 New Bellows Done Done Done Done Done Done Done Done Done Viewer Bellows Page 3

Vac Improvements - Air Lines Air Lines changed from Poly to Copper 100% Complete Copper Air Line Page 4

Vac Improvements - VBV Pigtails New Connectors & Cables to replace Rad damage 100% Complete North and South VBV Pigtail upgraded for Radiation environment Page 5

Vac Improvements - Position Switches VBV Position Switches from Plastic to Metal 41% Complete All-Metal Switch w/pigtail Page 6

Vac Improvements - Position Switches VBV Position Switches from Plastic to Metal VBV Position Switches (A,B) 1L02 1L03 1L04 1L05 1L06 1L07 1L08 1L09 1L10 1L11 1L12 1L13 1L14 1L15 1L16 1L17 1L18 1L19 1L20 1L21 1L22 1L23 1L24 1L25 1L26 2L02 2L03 2L04 2L05 2L06 2L07 2L08 2L09 2L10 2L11 2L12 2L13 2L14 2L15 2L16 2L17 2L18 2L19 2L20 2L21 2L22 2L23 2L24 2L25 2L26 2L26 2L04 VBV Position Switches (A,B) 1L02 1L03 1L04 1L05 1L06 1L07 1L08 1L09 1L10 1L11 1L12 1L13 1L14 1L15 1L16 1L17 1L18 1L19 1L20 1L21 1L22 1L23 1L24 1L25 1L26 2L02 2L03 2L04 2L05 2L06 2L07 2L08 2L09 2L10 2L11 2L12 2L13 2L14 2L15 2L16 2L17 2L18 2L19 2L20 2L21 2L22 2L23 2L24 2L25 2L09 VBV Position Switches (A,B) 2L24 2L22 2L23 2L03 2L25 1L05 1L26 1L21 1L17 2L11 2L08 2L26 2L16 1L24 2L15 1L11 2L07 2L02 2L06 2L12 1L02 1L12 1L19 1L13 1L10 2L21 1L18 1L14 1L09 1L03 1L22 1L23 2L18 2L13 2L14 2L05 1L25 2L20 1L06 1L07 1L20 1L15 2L19 1L16 2L10 1L08 2L17 1L04 Replaced Metal switches Switches switches 2L24A 2L22B 2L23A & B Replaced Metal Metal Replaced Steve's Rad Survey List Survey List 2L24 2L22 2L23 Mike's Data Avg Radial 14310 12861 10773 10241 9280 8487 8477 7744 7645 7515 7294 6892 6813 6729 6614 5717 5474 5346 5164 5054 5016 4935 4930 4657 4459 4311 4288 3809 3806 3674 3321 2952 2552 2417 2307 2252 2212 2184 2116 2098 1958 1372 1263 1147 1118 990 870 248 88 32 Mike's Data Max Radial 25828 25278 24127 37414 18504 15458 18791 25107 29932 39940 31405 14864 19658 19440 37020 15853 12225 16099 21834 27510 20928 33561 32688 14807 18698 16005 9416 11576 11173 8719 18218 16929 7491 8782 6815 7469 9837 11635 7138 7347 3678 2776 6802 4060 8771 6142 1712 1075 200 230 Mike's Data Avg BL 18964 29167 10947 18387 16101 17753 17264 13095 10042 7335 15642 11204 7482 10628 11860 13506 15625 15090 14594 13738 5265 5925 11810 7533 11045 10765 11913 11513 6264 11798 5973 6646 5404 6399 8890 7642 1983 8409 10732 4277 12370 5760 7795 4896 830 7024 4880 3528 245 159 Mike's Data Max BL 30790 46439 33016 32537 22827 24932 29080 27204 20304 25834 27668 21240 23771 19998 38074 28183 35212 25201 31348 25189 18226 20519 29611 21421 31768 36347 45666 47077 28979 25852 23824 28138 22704 18516 23024 23682 13798 23812 28415 24006 21459 21597 30006 20528 6414 31234 12489 17874 857 1202 Replace during SAD 2015 2L24B 2L22A Steve s Rad 1L05 1L06 2L25 1L05 1L26 2L03A & B 2L25B 1L05A & B 1L26B 1L21A & B 1L17A & B 2L11A & B 2L08 B 2L26A & B 2L16B 1L24A & B 2L15A & B 1L11A & B 2L07A & B 2L25A 1L26A 1L12 1L13 2L26 2L16 1L24 2L08A Switches Replaced: PreSAD SAD Total 2L16A 9 32 41 2L12A & B 1L23 1L24 1L25 1L26 1L12 1L12A & B 1L13 1L13A & B 1L26A 1L26A Remaining 59 $38k 2L08A 2L08A 1L23 1L25 1L06 2L16A 2L17A 2L17A 2L16 2L16A 2L22B 2L23A & B 2L24A 2L25A 2L25A 2L22 2L23 2L24 2L25 2L26 2L22B 2L23A & B 2L24A 2L17A Page 7

Vac Improvements VIPs VIP 3A17 4S00B 4S01A 4S03A 4S00C Problem Pump Shorted Railed Railed Railed Railed Status Red Red Red Red Red Counts 0 37 0 37 VIP Recovery - Goal is 100% - Status @ SAD Start Green Red Yellow Total VIP's BS00 3S02 9S01 7S01A AT02 6E03 AT05B 0L10 AA05 AA06 AA08 AA09 2L24A 1L18A 1L22A Clean High Volt Feed through. Install pwr supplies Clean High Volt Feed through. Install pwr supplies Clean High Volt Feed through. Install pwr supplies Clean High Volt Feed through. Install pwr supplies Railed Railed Railed plus Small Leak found Suspect leak Spurious Burps in Pressure needs investigation Spurious Burps in Pressure needs investigation Spurious Burps in Pressure needs investigation Spurious Burps in Pressure needs investigation Leak check degraded due to leaking ITV buggered out widen trip level Red Red Red Red Red Red Red Red Red Red Red Red Red Red Red 0102 1P01 1A24 1A26 2A16 4T09A 6S03A 6E01A 6E02 6T06A 6A01 8A25 8R01 5C03 9A22 9R07A 1R09 not communicating with epics- had been intermittent Configuration issue-Ketchum Railed needs investigation Railed needs investigation Railed needs investigation Railed needs investigation Railed needs investigation Railed needs investigation Railed needs investigation Railed needs investigation Railed needs investigation Yellow needs investigation Yellow needs investigation Intermittant grn, yellow, railed. Investigate Railed needs investigation Railed needs investigation Railed new Red Red Red Red Red Red Red Red Red Red Red Red Red Red Red Red Red Page 8

Vac Improvements VIPs VIP 3A17 4S00B 4S01A 4S03A 4S00C BS00 3S02 9S01 7S01A AT02 6E03 AT05B 0L10 AA05 AA06 AA08 AA09 2L24A 1L18A 1L22A 0102 1P01 1A24 1A26 2A16 4T09A 6S03A 6E01A 6E02 6T06A 6A01 8A25 8R01 5C03 9A22 9R07A 1R09 Problem Pump Shorted Railed Railed Railed Railed Clean High Volt Feed through. Install pwr supplies Clean High Volt Feed through. Install pwr supplies Clean High Volt Feed through. Install pwr supplies Clean High Volt Feed through. Install pwr supplies Railed Railed Railed plus Small Leak found Suspect leak Spurious Burps in Pressure needs investigation Spurious Burps in Pressure needs investigation Spurious Burps in Pressure needs investigation Spurious Burps in Pressure needs investigation Leak check degraded due to leaking ITV buggered out widen trip level not communicating with epics- had been intermittent Configuration issue-Ketchum Railed needs investigation Railed needs investigation Railed needs investigation Railed needs investigation Railed needs investigation Railed needs investigation Railed needs investigation Railed needs investigation Railed needs investigation Yellow needs investigation Yellow needs investigation Intermittant grn, yellow, railed. Investigate Railed needs investigation Railed needs investigation Railed new Status Green Red Red Green Red Green Green Green Green Green Green Green Green Green OFF OFF OFF Green Green Green Green Green Green Green Green Green Green Green Green Green Green Green Green OFF Green Green Green Counts 30 3 0 4 37 VIP Recovery - 81% Complete Green Red Yellow OFF Total VIP's <80 uA 100 uA 80-99 uA Joint effort troubleshooting by Vac & Vac ICN to include cables, connectors, cards, VIP hi-potting, VIP repair, and power supply replacements. Additional improvements made by Vac ICN to Rad harden the VIP power supplies with upgraded HV diodes. Page 9

Synchrotron Radiation Effects Analysis of Thermal effects* Synchrotron radiation heating was evaluated in the higher energy arcs (x-direction) and the higher energy spreader/recombiner dipoles (y-direction). Arc s max temperature at girder bellows flange is 70 deg C (158F) ZA s max temperature at top of chamber is 39 deg C (102 F). Reports indicate these are conservative temps higher than expected and indicate the synchrotron radiation heating will not be a problem for 12GeV CEBAF. Run Experience During our Spring run some vacuum excursions were noted in the 2R and 2S regions. As a precautionary measure additional Turbo pumps were added to the common vacuum in 2R and 2S (unexpected synchrotron radiation effect?). The pumps provided no change in the vacuum state and were valved out. The machine settled out and the Turbo s remained valved out for the duration of the run. Actions Taken The turbo pumps were removed and serviced, if needed they are ready to be deployed. * Synchrotron Radiation Power at CEBAF 12 GeV Upgrade B Yunn and Eduard Pozdeyev. TN-06-004 * Synchrotron Radiation Thermal Effect on the 12 GeV CEBAF - June 20, 2006, M. Wiseman, S. Slachtouski, K. Wilson, and B. Yunn * Synchrotron Light Radiation Heating in 1stSpreader 2010 (unreleased), C. Dubbe Page 10

Vacuum Spares Position Switches, Metal - 0 ($640 ea), Plastic - 24 VBV s Linacs 4 General Accel 20 VIP s New 11 L/s 2 New 25 L/s 1 ($1800 ea) 11 L/s ready for rebuild ($600 ea) 11 L/s on Rad Hold 21 (approx. 6 mo to 1 yr to release) VIP Ion Packs/ Power Supplies - 11 Tunnel Pump Carts - 4 Page 11

Vacuum: 12GeV Hardening - Conclusion Proactive improvements have been made to the Vacuum System based on downtime and repairs and is ready for the 12 GeV run. Vacuum Improvements will continue during upcoming SAD s. Page 12

Vacuum: 12GeV Hardening Thank You!!! Anthony Dela Cruz George Greenfield John Heckman Leo Ketchum Jim Kortze Mark Lester Greg Marble Elliott Smythe Joshua Thomason Page 13