vacuum, h-c. hseuh january 4, 2007 rhic ii project internal cost review vacuum systems h.-c. hseuh...

Vacuum, H-C. HseuhJanuary 4, 2007

RHIC II ProjectInternal Cost Review

Vacuum Systems

H.-C. Hseuh

January 4, 2007

Vacuum Systems

2 of 12


Scope - RHIC-II Vacuum Systems

1

3 4

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

3 of 12


~ 50m long, < 10-9 Torr

Clean and dust free

Cost estimate based on existing ERL

No. Chambers

Triplets 9

Doublets 15

Drift pipes 29

Dipole-60 7

Dipole-60-Y 3

Dipole-30-Y 2

Inj. chicane-15 1

Inj. chicane-30 2

Inj. chicane-15-Y 1

Dump -30-Y 1

Vacuum components:

Vacuum Chambers: ~ 70

GV: 11; RAV: 19

IP: 46; IPC: 26

VG: 33; GC: 12

TMP: 5

Scope 1 - ERL

Total ~ 70

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

5 of 12


Scope 2 – Electron Transport Vacuum

No Chambers

Drift pipe 10

Drift pipe-L 12

Dipole-30 1

Dipole-45 8

Bending-20 4

Bending-20-Y 4

Triplet-L 18

Triplet 4

Vacuum components:

Vacuum chambers: ~ 61

GV: 13; RAV: 12

IP: 42; IPC: 24

VG: 18; GC: 6

~ 110m, 10-9 Torr

Sector #2 (& also #1)

Total ~ 61

6 of 12


Scope 3 – Undulators / Cooling Sections

~ 210 m; < 1x10-10 Torr, bakeable to 250oC

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

7 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-B 4

D5O (D5I) C-B 4

D5O (D5I) W-C 4

Vert Corr Pipe 8

E - A cross pipe 4

W-B pipes (3) 4

Q3 & Q1 W-C 8

Q3-Q2-Q1 8

Q1 W-B 4

Vac Comp. Total

GV (DN125) 12

RAV 12

IP - 200 l/s 24

NEG Cartridges 4

NEG Pipes 12

TMP stations 4

VG 44

GC 14

Scope 4 - RHIC Modification (W-B + W-C + C-B + Insulating vacuum)

10-10 Torr vacuum

bakeable to 250oC

W-B

Total ~ 48

C-B

8 of 12


Costs by WBS

9 of 12


Major Procurements (direct $)

• Vacuum chambers (WBS 1.3.8.1 – 1.3.8.4)– ERL & transport dipole & triplet chambers - $498K– Cooling section NEG coating - $360K

• Vacuum pumps and valves (WBS 1.3.8.5)– All-metal gate valves - $640K– Ion pumps and controllers - $516K– NEG cartridges - $166K– Turbopump stations - $160K

• Vacuum instruments and control (WBS 1.3.8.6)– Gauges and controllers - $68K

10 of 12


Contingency & Risk

• Technical - medium

– Adequate spacing between two undulator sections at IP2

Bigger vertical separation, smaller aperture at IP

– <10-10 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%

11 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

12 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

vacuum, h-c. hseuh january 4, 2007 rhic ii project internal cost review vacuum systems h.-c. hseuh...

Documents