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


 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 for Phase 2 Cables on FWD Side 31.01.18: TB - Position of forward end-cap in Phase 3 2 carsten.niebuhr@desy.de

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

Problem area #1: CO 2 Pipes at -x Side Quite space restricting screws in the way … 31.01.18: TB - Position of forward end-cap in Phase 3 4 carsten.niebuhr@desy.de

Problem area #2: SVD LV Cables at +x Side Ichiro Adachi TB meeting 2017.10.12: https://kds.kek.jp/indico/event/25875/contribution/4/material/slides/0.pdf IDS - ECL gap (severe chicane) Put clay/putty, and push in CDC - ARICH gap Measure its height by caliper 31.01.18: TB - Position of forward end-cap in Phase 3 5 carsten.niebuhr@desy.de

CAD versus Reality Ichiro Adachi TB meeting 2017.10.12: https://kds.kek.jp/indico/event/25875/contribution/4/material/slides/0.pdf IDS-ECL • The distance of the ECL flange between FWD and BWD is longer than the design value (22->20) ARICH-CDC • I guess flatness of the ECL flange is not good. 1 mm deviated at some places, for instance. 31.01.18: TB - Position of forward end-cap in Phase 3 6 carsten.niebuhr@desy.de

Survey Results October 2017 SVD flat cable 18.5 CDC HV 20.0 20.0 SVD PS cable 18.5 18.5 19.5 20.0 18.5 E-hut side CDC air 20.0 21.0 19.5 18.5 19.5 19.5 21.0 20.0 Dock Ring-ARICH 20.0 20.5 20.5 ARICH-CDC 19.0 CDC gas design: 20 IDS-ECL 20.0 design: 22 → 20 Maybe underestimated in the right side Measurement on 2017.10.11 20.0 31.01.18: TB - Position of forward end-cap in Phase 3 7 carsten.niebuhr@desy.de

FWD Cables for Phase 3 PXD 4 / 40 chicane FWD PXD SVD 6 / 36 power SVD HV, LV, environm. monitors CO2 flex lines Across the CDC wall ,C. Kiesling, 24th B2GM, KEK, June 20-24, 2016 31.01.18: TB - Position of forward end-cap in Phase 3 8 carsten.niebuhr@desy.de

FWD Cables for Phase 3 PXD 4 / 40 SVD flat cable 18.5 CDC HV chicane 20.0 20.0 FWD SVD PS cable 18.5 PXD SVD 6 / 36 18.5 19.5 power 20.0 SVD HV, LV, 18.5 E-hut side environm. CDC air monitors 20.0 21.0 CO2 flex lines 19.5 18.5 19.5 19.5 21.0 20.0 Dock Ring-ARICH 20.0 20.5 20.5 ARICH-CDC 19.0 CDC gas design: 20 IDS-ECL 20.0 Across the CDC design: 22 → 20 wall Maybe underestimated in the right side ,C. Kiesling, 24th B2GM, KEK, June 20-24, 2016 31.01.18: TB - Position of forward end-cap in Phase 3 8 carsten.niebuhr@desy.de Measurement on 2017.10.11 20.0

FWD Cables for Phase 3 PXD 4 / 40 SVD flat cable 18.5 CDC HV chicane chicane 20.0 20.0 FWD FWD SVD PS cable 18.5 PXD PXD SVD 6 / 36 18.5 19.5 power power 20.0 SVD HV, LV, SVD HV, LV, 18.5 E-hut side environm. environm. CDC air monitors monitors 20.0 21.0 CO2 flex lines CO2 flex lines 19.5 18.5 19.5 19.5 21.0 20.0 Dock Ring-ARICH 20.0 20.5 20.5 ARICH-CDC 19.0 CDC gas design: 20 IDS-ECL 20.0 Across the CDC Across the CDC design: 22 → 20 wall wall Maybe underestimated in the right side ,C. Kiesling, 24th B2GM, KEK, June 20-24, 2016 ,C. Kiesling, 24th B2GM, KEK, June 20-24, 2016 31.01.18: TB - Position of forward end-cap in Phase 3 8 carsten.niebuhr@desy.de 21 Measurement on 2017.10.11 20.0

Installation of VXD Outer Services 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 17.10.17: VXD Focussed Review: VXD Plan Phase 2 –> 3 9 carsten.niebuhr@desy.de

PXD Power Cables Plastic cover will be removed at - entrance to dock box - chicane 31.01.18: TB - Position of forward end-cap in Phase 3 10 carsten.niebuhr@desy.de

SVD Power Cables for 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? Orange: LV Grey: HV BW cables FW cables LV 30 18 HV 30 18 31.01.18: TB - Position of forward end-cap in Phase 3 11 carsten.niebuhr@desy.de

Possible Modifications of ECL Fixation Brackets Add here … or remove here Simplest solution: • Prepare different sets of shims • Need to study impact on mechanical integrity of support 31.01.18: TB - Position of forward end-cap in Phase 3 12 carsten.niebuhr@desy.de

To be watched: Gap between ECL-Shield and End-Yoke A 22 24 60(SC w/ cover) End- Yoke 20 34 4 B 20 R1180 BECL fl ange inner R Need to determine R1130 CDC end plate and CDC-SC actual clearance R1250 BECL inner R R1190.5 M6 Bolts ARICH � ���������������������� ��������������������������� R1145 ARICH ��������� √ ��� ��� C ������� End cap shield 103 � 290 � � � � � � � QCSR D 31.01.18: TB - Position of forward end-cap in Phase 3 13 carsten.niebuhr@desy.de � � � � � � � � ���� ���� ��� ������������ ��������� ������� ������������� ������������ ���������� ���� ��������������������������� ��� �������������������������������� �������������������� ���������� ������������ ������������������������ ������������ � ������������������������� ������������ ������������ ������������ ��������������������� ������������ �������������� ����������� ��������� ����������� �� ��������������������� � ����������� ������������ ����������� ��������� ����������� �� ���������������������������� ����������� ������������ ����������� ������������� ����������� ������������ �����������

Gemba on February 13 31.01.18: TB - Position of forward end-cap in Phase 3 14 carsten.niebuhr@desy.de

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 of 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 31.01.18: TB - Position of forward end-cap in Phase 3 15 carsten.niebuhr@desy.de