Vacuum, H-C. Hseuh January 4, 2007 RHIC II Project Internal Cost Review Vacuum Systems H.-C. Hseuh January 4, 2007 Vacuum Systems

Vacuum, H-C. Hseuh January 4, of 12 Scope - RHIC-II Vacuum Systems 1 34 Four Vacuum Regions / Scopes 1.ERL 2.Electron Transports 3.Cooling Sections 4.RHIC Modification Three WBS Categories A. Vacuum Chambers B. Pumps & Valves C. Monitoring & Control 2 IP2

Vacuum, H-C. Hseuh January 4, of 12 ~ 50m long, < Torr Clean and dust free Cost estimate based on existing ERL No. Chambers Triplets9 Doublets15 Drift pipes29 Dipole-607 Dipole-60-Y3 Dipole-30-Y2 Inj. chicane-151 Inj. chicane-302 Inj. chicane-15-Y1 Dump -30-Y1 Vacuum components: Vacuum Chambers: ~ 70 GV: 11; RAV: 19 IP: 46; IPC: 26 VG: 33; GC: 12 TMP: 5 Scope 1 - ERL Total ~ 70

Vacuum, H-C. Hseuh January 4, of 12 ERL dipole chamber ERL quad chamber BPM mounting block RHIC II ERL will be similar to existing ERL Aluminum dipole chambers, inconel quqdrupole chambers with BPM blocks, bellows and pumping ports Scope 1 - ERL Vacuum ERL quad chamber

Vacuum, H-C. Hseuh January 4, of 12 Scope 2 – Electron Transport Vacuum No Chambers Drift pipe10 Drift pipe-L12 Dipole-301 Dipole-458 Bending-204 Bending-20-Y4 Triplet-L18 Triplet4 Vacuum components: Vacuum chambers: ~ 61 GV: 13; RAV: 12 IP: 42; IPC: 24 VG: 18; GC: 6 ~ 110m, Torr Sector #2 (& also #1) Total ~ 61

Vacuum, H-C. Hseuh January 4, of 12 Scope 3 – Undulators / Cooling Sections ~ 210 m; < 1x Torr, bakeable to 250 o C 36 x 4m undulator pipes, w/ NEG coating < 60mm Ф at IP, larger Ф away from IP Tight spacing between two beam pipes at IP2 At IP2 Vacuum components: Undulator pipes: 36 x 4m Bellows: 32 GV: 4; RAV: 8 IP: 16; IPC: 8 VG: 16; GC: 8 NEG cartridge: 16 At IP2 IP2

Vacuum, H-C. Hseuh January 4, of 12 Remove IR2, DX, DX-D0 Relocate & modify 4 triplets Modify interconnects at D5-Q9 Install W-B vacuum Restore insulating vacuum Move diagnostics to #9 & #10 YI2, YO1, BI1, BO2 No Q6 C-B4 D5O (D5I) C-B4 D5O (D5I) W-C4 Vert Corr Pipe8 E - A cross pipe4 W-B pipes (3)4 Q3 & Q1 W-C8 Q3-Q2-Q18 Q1 W-B4 Vac Comp.Total GV (DN125)12 RAV12 IP l/s24 NEG Cartridges4 NEG Pipes12 TMP stations4 VG44 GC14 Scope 4 - RHIC Modification (W-B + W-C + C-B + Insulating vacuum) Torr vacuum bakeable to 250 o C W-B Total ~ 48 C-B

Vacuum, H-C. Hseuh January 4, of 12 Costs by WBS

Vacuum, H-C. Hseuh January 4, of 12 Major Procurements (direct $) Vacuum chambers (WBS – ) –ERL & transport dipole & triplet chambers - $498K –Cooling section NEG coating - $360K Vacuum pumps and valves (WBS ) –All-metal gate valves - $640K –Ion pumps and controllers - $516K –NEG cartridges - $166K –Turbopump stations - $160K Vacuum instruments and control (WBS ) –Gauges and controllers - $68K

Vacuum, H-C. Hseuh January 4, of 12 Contingency & Risk Technical - medium –Adequate spacing between two undulator sections at IP2 Bigger vertical separation, smaller aperture at IP –< Torr in the cooling sections with both beams Low desorption and sufficient pumping (NEG coating and lump pumps) Schedule - high –Adequate time and manpower for installation in RHIC tunnel Two shutdowns - one for diagnostics relocation? One “long” shutdown? Cost - medium –Manpower for RHIC Modification may not be sufficient Start detailed layout early to better understand the installation effort Overall Contingency: ~ 31%

Vacuum, H-C. Hseuh January 4, of 12 Milestones Design of cooling section vacuum NEG coating of cooling section chambers ERL vacuum commissioning RHIC modification and cooling sections installation All vacuum systems commissioning

Vacuum, H-C. Hseuh January 4, of 12 Assumptions No major mechanical interference of undulator sections at IP2 Successful development of NEG coating for the cooling section beam pipes Sufficient shutdown time and manpower between physics runs for RHIC modification and installation of cooling sections Cost of vacuum pumps, valves & monitoring is based on catalog price and historical cost Cost of vacuum chambers is based on recent ERL purchase, historical cost and engineering judgment