Position of Forward End-cap in Phase 3 Disclaimer: This is more a - - PowerPoint PPT Presentation

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Position of Forward End-cap in Phase 3 Disclaimer: This is more a - - PowerPoint PPT Presentation

Jul 31, 2023 293 likes •484 views

Position of Forward End-cap in Phase 3 Disclaimer: This is more a reminder - not much new since presentation by Adachi-san at TB during Oct B2GM https://kds.kek.jp/indico/event/25875/contribution/4/material/slides/0.pdf Original Plan

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SLIDE 1

Position of Forward End-cap in Phase 3

Disclaimer: This is more a reminder - not much new since presentation by Adachi-san at TB during Oct B2GM





https://kds.kek.jp/indico/event/25875/contribution/4/material/slides/0.pdf

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SLIDE 2

carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

Original Plan for Phase 2 Cables on FWD Side

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carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

Actual Implementation

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carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

Problem area #1: CO2 Pipes at -x Side

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Quite space restricting screws in the way …

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SLIDE 5

carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

Problem area #2: SVD LV Cables at +x Side

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Put clay/putty, and push in Measure its height by caliper IDS - ECL gap CDC - ARICH gap (severe chicane)

Ichiro Adachi TB meeting 2017.10.12: https://kds.kek.jp/indico/event/25875/contribution/4/material/slides/0.pdf

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SLIDE 6

carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

CAD versus Reality

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ARICH-CDC IDS-ECL Ichiro Adachi TB meeting 2017.10.12: https://kds.kek.jp/indico/event/25875/contribution/4/material/slides/0.pdf

  • The distance of the ECL flange between FWD and BWD is

longer than the design value (22->20)

  • I guess flatness of the ECL flange is not good. 1 mm deviated

at some places, for instance.

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SLIDE 7

carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

Survey Results October 2017

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Dock Ring-ARICH ARICH-CDC IDS-ECL 20.5 20.0 20.0 18.5 21.0 20.0 20.0

Measurement on 2017.10.11

18.5 20.0 SVD flat cable 18.5 18.5 SVD PS cable 20.0 CDC air 19.5 18.5 19.0 20.0 CDC gas 21.0 20.5 19.5 19.5 20.0 19.5 CDC HV design: 22→20 design: 20

Maybe underestimated in the right side

E-hut side

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SLIDE 8

carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

FWD Cables for Phase 3

8 ,C. Kiesling, 24th B2GM, KEK, June 20-24, 2016

FWD

chicane Across the CDC wall PXD power SVD HV, LV, environm. monitors CO2 flex lines

PXD 4/40 SVD 6/36

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SLIDE 9

carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

FWD Cables for Phase 3

8 ,C. Kiesling, 24th B2GM, KEK, June 20-24, 2016

FWD

chicane Across the CDC wall PXD power SVD HV, LV, environm. monitors CO2 flex lines

Dock Ring-ARICH ARICH-CDC IDS-ECL 20.5 20.0 20.0 18.5 21.0 20.0 20.0

Measurement on 2017.10.11

18.5 20.0 SVD flat cable 18.5 18.5 SVD PS cable 20.0 CDC air 19.5 18.5 19.0 20.0 CDC gas 21.0 20.5 19.5 19.5 20.0 19.5 CDC HV design: 22→20 design: 20

Maybe underestimated in the right side

E-hut side

PXD 4/40 SVD 6/36

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SLIDE 10

carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

FWD Cables for Phase 3

8 ,C. Kiesling, 24th B2GM, KEK, June 20-24, 2016

FWD

chicane Across the CDC wall PXD power SVD HV, LV, environm. monitors CO2 flex lines

,C. Kiesling, 24th B2GM, KEK, June 20-24, 2016 21

FWD

chicane Across the CDC wall SVD HV, LV, environm. monitors PXD power CO2 flex lines

Dock Ring-ARICH ARICH-CDC IDS-ECL 20.5 20.0 20.0 18.5 21.0 20.0 20.0

Measurement on 2017.10.11

18.5 20.0 SVD flat cable 18.5 18.5 SVD PS cable 20.0 CDC air 19.5 18.5 19.0 20.0 CDC gas 21.0 20.5 19.5 19.5 20.0 19.5 CDC HV design: 22→20 design: 20

Maybe underestimated in the right side

E-hut side

PXD 4/40 SVD 6/36

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SLIDE 11

carsten.niebuhr@desy.de 17.10.17: VXD Focussed Review: VXD Plan Phase 2 –> 3

Installation of VXD Outer Services

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Activity Days Work days weeks mon mount dockboxes (FWD BWD in parallel) 2 2 PXD Power cables BWD (40 cables) 4 4 SVD power BWD (60 cables) 5 5 PXD Power cables FWD (40 cables) 4 SVD power FWD (36 cables) 3 PXD signal cables BWD (20 + 8 + 8) 4 4 SVD signal cables BWD (111 cables) 6 6 PXD signal cables FWD (20 + 8 + 8) 4 SVD signal cables FWD (61 cables) 4 VXD montor cables BWD 5 5 VXD monitor cables FWD 2 2 sum (including 1 week of scaffolding) 28 6

Try to parallelize work as much as possible. Type of cables and tight space requirements on CDC end plate and in ECL slots dictate installation sequence: PXD power –> SVD power –> PXD signal –> SVD signal

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carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

PXD Power Cables

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Plastic cover will be removed at

  • entrance to dock box
  • chicane
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carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

6 round LV power cables (D=12.5mm; 0.254 kg/m) per DOCK

  • Leoni LEHC 002054

6 round HV cables (D=6.4mm; 0.081 kg/m) per DOCK box

  • 3M HF659/10

Question to SVD group:

  • can plastic cover be removed in chicane area?

SVD Power Cables for Phase 3

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BW cables FW cables LV 30 18 HV 30 18 Orange: LV Grey: HV

√

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carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

Possible Modifications of ECL Fixation Brackets

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Add here … or remove here Simplest solution:

  • Prepare different sets of shims
  • Need to study impact on

mechanical integrity of support

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SLIDE 15

carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

To be watched: Gap between ECL-Shield and End-Yoke

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  • 290

R1145 ARICH R1180 BECL flange inner R 20 A B C D 60(SC w/ cover)

  • 20
  • 22
  • QCSR

R1130 CDC end plate and CDC-SC

ARICH

  • 24

103

  • R1190.5 M6 Bolts

R1250 BECL inner R 4 34

End cap shield

  • Need to determine

actual clearance End- Yoke

√

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carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

Gemba on February 13

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carsten.niebuhr@desy.de 31.01.18: TB - Position of forward end-cap in Phase 3

Summary

Installation of outer cables for phase 3 will be a very difficult and time consuming task

  • Estimate of 28 working days seems rather aggressive

The presently available space (FWD) is insufficient for ~10x more cables Options to provide extra space between FWD endcap and CDC exist

  • Agree on and include neccessary actions in overall schedule
  • Increase of gap by 5mm would be sufficient - can we afford this?

Need to understand / do

  • How much can be gained by modifying cables (locally remove plastic cover
  • f power cables)? Can we tolerate the risk of damage?
  • Can IDS/TOP fixation screws be modified/exchanged (/thin head)?
  • Perform survey of ECL end flange and implement shape in CAD model
  • Study feasibility of different options of end-cap support modification
  • Measure actual clearance between end-yoke and ECL-shield mounting links
  • Estimate impact of increased gap between barrel and FWD end-cap on

physics performance

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