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

Vacuum, H-C. Hseuh January 4, Four Vacuum Areas and Three Sub-systems (1) ERL, (2) Electron Transport, (3) Cooling, (4) RHIC Modification (A) Chambers, (B) Pumps & Valves, (C) Monitoring & Control Scope - RHIC-II Vacuum Systems

Vacuum, H-C. Hseuh January 4, < Torr UHV, Clean and dust free Cost estimate based on existing ERL No. Chambers Triplets9 Doublets15 Drift pipes12 Dipole-607 Dipole-60-Y (60)1 Dipole-60-Y (30)2 Dipole-301 Dipole-30-Y (30)1 Inj. chicane-151 Inj. chicane-302 Inj. chicane-15-Y1 Inj. drift pipes4 Dump drift pipes1 Dump -30-Y1 Dump pipe2 Pipe for solenoids4 Adaptors for RF6 Vacuum components: Vacuum Chambers: ~ 70 GV: DN100 (8), DN63 (3), RAV (19) IP: 20 l/s (40), 200 l/s (6), IPC (26) VG: CCG (21), TCG (12), GC (12) TMP: Beam (2), Insulating (3) Total 70 chambers Scope - ERL Design, fabrication, assembly, evaluation, installation and commissioning ~ 50 m UHV systems Including all the vacuum chambers, pumps, valves, monitoring and control 70

Vacuum, H-C. Hseuh January 4, ERL dipole chamber ERL triplet chamber BPM mounting block RHIC II ERL ring vacuum will be similar to existing ERL vacuum loops Aluminum dipole chambers, Inconel doublet and triplet chambers with BPM blocks, bellows and pumping ports on quadrupole chambers ERL Vacuum ChambersScope - ERL ERL triplet chamber

Vacuum, H-C. Hseuh January 4, Scope – Electron Transport Vacuum Chamber TypeNo. Drift pipe10 Drift pipe-L12 Dipole-301 Dipole-458 Bending-204 Bending-20-Y4 Triplet-L18 Triplet4 Vacuum components: Vacuum chambers: ~ 61 GV: DN63 (13); RAV: (12) IP: 20 l/s (42), IPC (24) VG: CCG (12), TCG (16), GC (6) ~ 110m < 1x10 -7 Torr vacuum < 1x10 -9 Torr at HI beam cross-over Design, fabrication, assembly, evaluation, installation and commissioning ~ 110 m vacuum systems Including all the vacuum chambers, pumps, valves, monitoring and control 61 #1 & #2

Vacuum, H-C. Hseuh January 4, Scope – Undulators/Cooling Sections PipeGVRAVIPNEGCCGTCGGCBellows YI YO BI BO ~ 210 m; < 1x Torr with beams In-situ bakeable to 250 o C < 60mm Ф pipes at IP, larger away from IP 5m long NEG coated ( ~ 1 μm) beam pipes Bellows and pump between beam pipes Clearance at flange location!! Can’t make 13m long pipes!! 10mm (coil, wall, …..) 10mr D = 70mm R = 30mm F=116mmФ R(mm) = x σ D(mm) F(mm) L(m) 13? 4 Is this possible? At flange locationAt IP2 1 σ(98%) = 3.3mm < 14 σ or 17 σ? Larger V kick?

Vacuum, H-C. Hseuh January 4, Remove IR2, DX, DX-D0 Relocate & modify 4 triplets Relocate diagnostics to #9 & #10 Modify Q4-Q9 arcs Restore insulating vacuum YI2, YO1, BI1, BO2 No. Q6 C-B4 D5O (D5I) C-B4 D5O (D5I) W-C4 Gate Valve4 Bellows + IP4 Vert Corr Pipe4 Bellows4 E - A cross pipe4 W-B pipes (3)4 Bellows4 Vert Corr Pipe4 Bellows + IP4 Gate Valve4 Q3 W-C4 Q3-Q24 Q2-Q14 Q1 W-C4 Q1 W-B4 Gate Valve4 Bellows + IP4 Vac Comp.TotalOldNew GV (DN125)844 GV (DN100)440 RAV1266 IP l/s16 0 IP - 20 l/s844 NEG Cartridges404 NEG Pipes1266 TMP stations422 CCG28244 TCG16142 GC14122 Scope - RHIC Modification (W-B + C-B + Insulating vacuum) Torr vacuum In-situ bakeable to 250 o C Detail design to eliminate interference Installation between physics runs

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

Vacuum, H-C. Hseuh January 4, Major Procurements (direct $) Vacuum chambers –ERL dipole chambers - $96K; triplet chambers - $137K ( ) –Electron transport dipole chambers - $136K; triplet chambers - $130K ( ) –Cooling section NEG coating - $360K; heating jackets - $144K ( ) Vacuum pumps and valves (WBS ) –All-metal gate valves - $640K –Ion pumps - $200K –NEG cartridges - $166K –Heating jackets - $234K –Turbopump stations - $160K Vacuum instruments and control (WBS ) –Gauges and controllers - $68K –Ion pump controllers - $316K

Vacuum, H-C. Hseuh January 4, Contingency & Risk Technical - medium –Adequate spacing between two cooling sections to provide sufficient aperture for the beam and undulator coils Bigger vertical separation, smaller aperture at IP by AP? –< Torr with beam loss and multi-pacting in the cooling sections Sufficient pumping with NEG coating and ion pumps Schedule - high –Manpower for vacuum chamber design Freeze physics design, start engineering design early –Adequate periods and manpower between physics runs for RHIC modifications and relocation of the diagnostics to sectors #9 and #10 Diagnostics relocation and RHIC modification at different shutdown Cost - medium –Labor for RHIC Modification may not be sufficient due to lack of detail design and layout, and for diagnostic relocation Start detailed layout early to better understand the installation effort

Vacuum, H-C. Hseuh January 4, Milestones Design of cooling section vacuum complete Procurement and NEG coating of chambers complete Installation of ERL vacuum complete Installation of RHIC modification and cooling sections complete Vacuum system commissioning complete

Vacuum, H-C. Hseuh January 4, Assumptions Sufficient clearance between cooling section beam pipes at IP2; adequate spacing between undulator sections for bellows, flanges and pumps 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 cost and from engineering judgment