enen h- injection: status on mechanical design - vacuum sectorization - bhz162 chamber modifications...
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H- INJECTION:STATUS ON MECHANICAL DESIGN
- VACUUM SECTORIZATION- BHZ162 CHAMBER MODIFICATIONS- DESIGN @ DUMP AREA- BHZ11 CHAMBER MODIFICATIONS
PSB H- Injection - Design Technical Meeting – 3rd October 2013
3/10/2013 Marco Garlaschè
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3/10/2013 Marco Garlaschè
Vacuum Sectorization:
• Not enough space for all sectorization-related components in the stripping area
• Radiation dose should be minimized for maintenance interventions on the injection dump area
ACTION (TE/VSC): determine alternative sectorization scenarios and evaluate impact on vacuum performance
Stripping foil sector: initial baseline configuration
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3/10/2013 Marco Garlaschè
Different options presented (Design Tech.Meet 03/07/2013)
Options # 4 & 5 chosen for followup
• Option 4 causes more dose @ intervention on downstream valves
• Option 5 foresees venting of dump at each maintenance
TMP gate
2X SIP
Dump
BHZ162
OPTION 4
OPTION 5
TMP gate
2X SIP 2X SIP
Dump
BHZ162 BHZ11
Courtesy C. Pasquino
ACTION (TE/VSC): finalize impact evaluation on vacuum performance for two options
Vacuum Sectorization:
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3/10/2013 Marco Garlaschè
Results for pumping down times:(PSB Upgrade WG @ 19/09/2013 presentation)
• Option 4: +2 hrs w.r.t. baseline• Option 5: +4.5 hrs w.r.t. baseline
Option 5 is new baseline (minutes)
NOTE: choice valid only if dump degassing stays similar to current estimation (i.e. Bulk SiC)
ACTION (TE/VSC & EN/STI): Study the impact of a sliced H-/H0 dump on the pumping down time for option 5
BASELINE
Vacuum Sectorization:
ongoing
Courtesy J. Hansen
NOTE: Option 5 has been studied w. Dump all @ 200C conservative as average Tdump shall be lower
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3/10/2013 Marco Garlaschè
Option 5: Integration
ACTION (EN/MME): evaluate integration for option 5 sectorization
completed
Courtesy L.Zuccalli
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3/10/2013 Marco Garlaschè
• Sectorization implemented• Corrector magnet design
ongoing.• For the moment no integration
issue foreseen. Fig. 3
Aimants correcteur DVT70
• BHZ 162 is first constraint for correctors
• Min. distance between correctors and BHZ162 = 57mm
Option 5: Integration
COMMENTS??
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3/10/2013 Marco Garlaschè
Option 5: Integration
Equal system already present on PSB line (ref. Dwg. PSBHVI__00021)
BHZ11
• No integration issue foreseen.
• Bellow needed between valve and chamber (position errors)
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3/10/2013 Marco Garlaschè
System is attached to top of BHZ magnets, as for other PSB sectors
Option 5: Integration
BHZ162
• No integration issue foreseen.
• Bellow needed between valve and chamber (position errors)
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3/10/2013 Marco Garlaschè
Option 5: Integration
Pumping system implemented
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H- INJECTION:STATUS ON MECHANICAL DESIGN
- VACUUM SECTORIZATION- BHZ162 CHAMBER MODIFICATIONS- DESIGN @ DUMP AREA- BHZ11 CHAMBER MODIFICATIONS
PSB H- Injection - Design Technical Meeting – 3rd October 2013
3/10/2013 Marco Garlaschè
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3/10/2013 Marco Garlaschè
Injection VS. BHZx : Joining
BSWx
BHZx
Misalignment error to be accounted for, as could cause rupture of ceramic flanges
Little space between components
Vacuum maintenance:• 12 mm axial
compression for Ag gasket insertion
• Low transversal forces desired
• Intermediate edge-welded bellow.• Company feedback (for our racetrack section):
max misalignment error ±1.5mm
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3/10/2013 Marco Garlaschè
Possible issue! ACTION: get final value of position error
BHZ162 Chamber: Current Configuration
Upstream Connection
Downstream Connection (Injection)
ChamberFixation/regulation elementsPipeHydroformed bellow
• Current alignment system not precise : connections position error>±2mm
• For the moment, further regulation would be obtained with deformation of semirigid hyperstatic element (undulated chamber).
Ref. dwg: SI 3.49.1542
NOTE: chambers with bellows at both extremities are present on the PSB line
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3/10/2013 Marco Garlaschè
New bellow for sector valves Current bellow and small chamber removed due to new injection compatibility
ACTION:• modify fix./reg. system?• Evaluate effects of regulation on
semirigid element
BHZ162 Chamber: Future Configuration
Can modifications be done on current chamber in tunnel?...precise cut of chamber, weld in small spaces..
Baseline future BHZ162 : modifications to spare on surface
Sector valves
NOTE: same considerations can be drawn for BHZ11 (sector at its exit, bellow present)
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H- INJECTION:STATUS ON MECHANICAL DESIGN
- VACUUM SECTORIZATION- BHZ162 CHAMBER MODIFICATIONS- DESIGN @ DUMP AREA- BHZ11 CHAMBER MODIFICATIONS
PSB H- Injection - Design Technical Meeting – 3rd October 2013
3/10/2013 Marco Garlaschè
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3/10/2013 Marco Garlaschè
Following dump review (18/04/2013), baseline configuration for dump is SiC bulk (PSB Upgrade WG 13/6/2013)
Baseline dump design status:
SiC
ACTIONS MME:• Dump Design
o cooling systemo support systemo eventual shielding
• Resistance of magnet to heating from dump
ongoing
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3/10/2013 Marco Garlaschè
Swelling of SiC at low dpa unknown bulk option may suffer excessive damage (2-3 yrs expected life)
New draft concept design shown (Design Tech.Meet 31/07/2013)
SiC slices + Ti slices SiC slices + Sic core in Ti Jacket
Metal bulk (Al, Ti..)
Dump design: new outcomes
ACTION EN/MME: STI requests evaluation of feasibility and integration
completed
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3/10/2013 Marco Garlaschè
Dump design: Integration proposals
• Edge-welded bellow on BSW4 side• Δz = 54 mm
Δz : max distance between downstream surface of red plate and downstream surface of dump
• Edge-welded bellow on BHZ11 chamber
• Δz = (15+70+15) mm
Proposal 1 (Sliced dump)
OPEN QUESTION: which is min Δz for not disturbing ?
Proposal 2 (Metal dump)
Δz = 54 mm
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H- INJECTION:STATUS ON MECHANICAL DESIGN
- VACUUM SECTORIZATION- BHZX CHAMBER MODIFICATIONS- DESIGN @ DUMP AREA- FURTHER BHZ11 CHAMBER MODIFICATIONS
PSB H- Injection - Design Technical Meeting – 3rd October 2013
3/10/2013 Marco Garlaschè
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3/10/2013 Marco Garlaschè
BHZ11 Chamber: Current & Future Configuration
Current bellow (useable for sectorization)
Future Edge-welded bellow, in case of metal dump
NOTE: chambers with bellows at both extremities are present on the PSB line
• Metal dump case would add one manipulation to BHZ11 chamber• Most probably done on surface
Ref. dwg: SI 3.49.1215
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3/10/2013 Marco Garlaschè
CONCLUSIONS
Evaluation performed on sector. option 5: feasible
Also with baseline dump config. (bulk SiC) and whatever sector. option:- BHZ162 chamber needs to be changed (alignment issue + sector.)- following misalignement measurement, BHZ11 chamber may be changed Need for alignment design?
Integration of new dump proposals studied:- BHZ11 chamber needs to be changed for metal dump case
ACTIONS:Sliced H-/H0 dump: concept. design & impact pumping down Current BHZx chambers: value of position errorFuture BHZx chambers:
• modify fix./reg. system?• evaluate effects of regulation on semirigid element
Baseline dump:• design (cooling, support, shielding)• resistance of magnet to heating from dump Need input:
• PLOSS
• temperatures• Cooling on for chamber?• Can magnet cooling
absorb dump heat?