Summary of B2GM & Satellite Meetings Satellite Meetings: - - PowerPoint PPT Presentation

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Summary of B2GM & Satellite Meetings Satellite Meetings: - - PowerPoint PPT Presentation

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Summary of B2GM & Satellite Meetings Satellite Meetings: Saturday, Oct. 17: VXD Mechanics https://kds.kek.jp/indico/event/19932/ Sunday, Oct. 18: BEAST Mini Workshop https://kds.kek.jp/indico/event/19922/ B2GM: Monday, Oct. 19 Friday,

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SLIDE 1
  • C. Kiesling, PXD bi-weekly Seevogh meeting, Nov. 10, 2015

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B2GM: Monday, Oct. 19 – Friday, Oct. 23 https://kds.kek.jp/indico/event/19519/timetable/#all.detailed BPAC: Saturday, Oct. 24 – Monday, Oct. 26 https://kds.kek.jp/indico/event/19537/timetable/#all.detailed

Summary of B2GM & Satellite Meetings

Satellite Meetings: Saturday, Oct. 17: VXD Mechanics https://kds.kek.jp/indico/event/19932/ Sunday, Oct. 18: BEAST Mini Workshop https://kds.kek.jp/indico/event/19922/

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SLIDE 2

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 2

VXD Services

Tscharlie Ackermann (MPI Munich) Markus Friedl (HEPHY Vienna)

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SLIDE 3

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 3

Critical Space Allocations

Three critical areas for the services: FWD region: tight space for the 267 cables / pipes for clearance (“7 mm”) Outer region: chicane through ARICH / ECL BWD region: cable paths on the CDC backplane General rule: all services must have a connection at the docks

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SLIDE 4

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 4

Cable & Pipe Count

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SLIDE 5

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 5

Cable & Pipe Count

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SLIDE 6

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 6

Service Space in FWD Region

Extremely narrow gap in the FWD regions between inner CDC wall and QCS: only 24 mm clearance. This must be sufficient for the 267 cables and pipes AND has to conserve the “7 mm” rule: gap between cables and QCS outer envelope

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SLIDE 7

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 7

Crowded Region at VXD End Flange

SVD

PXD data PXD ctrl PXD power CAT 7

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SLIDE 8

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 8

Cooling for Machine Elements RVC Parrafin Cooling beampipe Water Cooling crotch part

BWD

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SLIDE 9

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 9

Water Cooling for Bellow Flanges beam pipe side RVC/ QCS side pipes to go along QCS surface pipes to go along CDC inner wall bellows

FWD bellows

space for beam position monitors

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SLIDE 10

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 10

FWD: Possible Solution

Principle of the Solution: ALL cooling pipes of the bellow flanges must go to the inner CDC cone, also those of the flange connected to the RVC Bellow flange at the beam pipe: All 4 pipes go “up” Bellow flange at the RVC: 2 pipes go up, 2 go down violett: “forbidden” space

Cooling crotch part

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SLIDE 11

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 11

“Soft” corrugated pipes compensate relative movement of beampipe and QCS FWD: The Solution All pipes go “upward”

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SLIDE 12

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 12

FWD: Extremely Tight Cable Arrangement will need a sophisticated cable holder design

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SLIDE 13

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 13

FWD: Extremely Tight Cable Arrangement

Glue Kapton ring to protect SVD cables against sharp metal edge

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SLIDE 14

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 14

FWD: Extremely Tight Cable Arrangement

violett: “forbidden” by 7 mm rule

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SLIDE 15

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 15

Going out to the Belle Platform Problematic: Dock Box area in the BWD region (for SWD) CDC wall in the BWD region Chicane in FWD

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SLIDE 16

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 16

BWD Mockup With SVD Cables

Hybrid Cables HV Power Cables LV Power Cables Cables to next 2 DOCK boxes Power cables for this DOCK box

  • M. Friedl, F. Buchsteiner (Vienna)

Dock Boxes: (10 FWD and 10 BWD) SVD: 5 Bw, 3 Fw PXD: 5 Bw, 5Fw

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SLIDE 17

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 17

BWD Mockup With SVD Cables

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SLIDE 18

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 18

  • SVD data cables can easily be

folded to follow corners

  • Arcs cannot be done (as with round

cables), but any kind of angles are possible

  • Thicker at bend (two cable layers)

BWD Mockup With SVD Cables

Cable folding successfully used at STAR-TPC

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SLIDE 19

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 19

BWD Mockup With SVD Cables

Crossing of PXD and SVD Cables unavoidable on the CDC endwall (BWD) Mockup shows: Gap of 20 mm large enough

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SLIDE 20

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 20

FWD / BWD Chicane

Chicane gap OK for all cables Needs to be verified with CO2 flexlines Brackets holding cables in place to be defined (e.g.: 20-30 mm before & after bend)

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SLIDE 21

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 21

Conclusion

Study (Tscharlie Ackermann) shows

  • The water cooling pipes of the bellow flange connecting to the RVC so far were

guided onto the QCS outer envelope.

  • If these pipes lie on the QCS outer envelope, the 7 mm rule cannot be fulfilled
  • If the water cooling pipes of bellow flange on the RVC side are guided onto the

CDC inner cylinder, together with the other cables/pipes, and when flextubes are used then

  • 7 mm rule in FWD area can be fulfilled (agreed with Kanazawa-san)
  • FWD cable cage quite complex -> 3D printing, under design
  • Cabling at BWD docks for SVD difficult, but doable,
  • chicane OK for VXD cables, but CO2 flexlines need to be checked
  • CDC wall (BWD) gap seems adequate for unavoidable cable crossings
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SLIDE 22

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 22

What should the Gold Layer Thickness be for Phase 3

Gold Layer for Phase 3

2 Be layers + paraffine cooling channel in between 0.3% X0 Inside: Au coating Study 6.6, 10, 12.5, 15, 20 µm (0.3 % X0 bei 10 µm) Main purpose of Au: Shield against synchrotron radiation

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SLIDE 23

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 23

Full simulation of Belle II VXD + beam pipe Vary Gold layer : 6.6, 10, 12.5, 15, 20 µm Studies:

  • Synchrotron photon absorption
  • Vertex resolution
  • Gamma conversion

Gold Layer for Phase 3

Fernando Abudinen (MPI)

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SLIDE 24

MeV Yuri Soloviev

,C. Kiesling, VXD Mechanicss Session, KEK, Oct. 17 2015

Spectrum of Syn Rad

2

MeV

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SLIDE 25

,C. Kiesling, VXD Mechanicss Session, KEK, Oct. 17 2015 25

PXD Mission @ Belle II : Minimize Syn Rad

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SLIDE 26

,C. Kiesling, VXD Mechanicss Session, KEK, Oct. 17 2015 26

entire beam pipe

Gold Mission @ Belle II : Minimize Syn Rad for PXD

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SLIDE 27

PXD Mission @ Belle II : Precision Vertexing D → Kp

,C. Kiesling, VXD Mechanicss Session, KEK, Oct. 17 2015 27

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SLIDE 28

PXD Mission @ Belle II : Precision Vertexing D → Kp

,C. Kiesling, VXD Mechanicss Session, KEK, Oct. 17 2015 28

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SLIDE 29

,C. Kiesling, VXD Mechanicss Session, KEK, Oct. 17 2015 29

B Decays with Neutral Particles : „Vertexing“

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SLIDE 30

,C. Kiesling, VXD Mechanicss Session, KEK, Oct. 17 2015 30

B Decays with Neutral Particles : „Vertexing“

Conversion probablility Electron tracks > 250 MeV/c

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SLIDE 31

,C. Kiesling, VXD Mechanicss Session, KEK, Oct. 17 2015

Conclusion on Gold Layer

  • Preliminary study (Fernando Abudinen, MPI) shows
  • Low energy synchrotron rad is effectively absorbed at

10 µm

  • Vertex reconstruction is pretty insensitive to small

changes in Au layer: 10 µm seems a good compromise

  • Photon conversion in beam pipe desirable, but not

too much profit for AU < 20µm

15

Recommendation: 10 µm seems a good compromise

Decision (10µm) was taken in the First Meeting of the Belle II Technical Board

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SLIDE 32

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 32

Diamond Cable Arrangement

Original idea: Diamond cable volume not part of PXD envelope Consequence: need machining of Heavy Metal (grooves to receive diamond cables) New scheme: Provide space for Diamond cables within the PXD envelope No machining of HM necessary, Need brackets to fix cables to HM.

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SLIDE 33

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 33

B2GM: Machine Status

SuperKEKB status, schedule and commissioning plan for phase 1 and phase 2

  • Y. Funakoshi
  • Accelerator Laboratory, KEK
  • 2015. 10. 19 @B2GM
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SLIDE 34

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 34

B2GM: Machine Status

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SLIDE 35

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 35

B2GM: Machine Status

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SLIDE 36

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 36

B2GM: Machine Status

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SLIDE 37

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 37

B2GM: Machine Status

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SLIDE 38

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 38

B2GM: Machine Planning, Phase 2

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SLIDE 39

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 39

B2GM: Machine Planning, Phase 2 Damping ring Milestones

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SLIDE 40

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 40

B2GM: Machine Planning, Phase 2

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SLIDE 41

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 41

B2GM: Machine Planning, Phase 2 Important for Phase 2: Final Focus quadrupoles

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SLIDE 42

,C. Kiesling, PXD bi-weekly Seevogh meeting,, Nov. 10 2015 42

B2GM: Status of Belle II Phase 2: Belle II on beam line, before: install ITOP, CDC and ARICH

Install ITOP and CDC Roll-in: Sept. 2016