PD5: Detector Integration / Machine Detector Interface

T. Markiewicz/SLAC

15 May 2014

SiD Meeting / AWLC Fermilab

Summary

2

Outline

• Parallel sessions were held with combinations of the CFS and

BDS groups

• Updates to the IR Access design shown by Harrison & Yamamoto

on Monday

• New information that may affect detector assembly & ideas for next

iterations of IR access design

• Session to discuss commissioning scenarios & working decision

• Tidbits from just-beginning BDS/AD&I discussions & presentations

that touch the MDI & may be discussion points at the next LCWS

3

Photo of Assembly area & IR access tunnel mouth for the baseline Horizontal Tunnel only option

PHOTO DELETED AS REQUESTED BY CONFERENCE ORGANIZERS

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Photo of Split Level Assembly area for Hybrid Access: SiD on lower pad that feeds tunnel mouthILD on upper pad over 18m shaft

PHOTO DELETED AS REQUESTED BY CONFERENCE ORGANIZERS

5

Elevation & Plan Views of Hybrid Tunnel/Shaft Access

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CMS-sized hall provided for ILD with a small side-space for the few times SiD may use the 18m shaft & gantry rather than the tunnel

7

SPS N-area hall is basis for SiD Assembly HallTunnel mouth directly outside hall

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Plan View of Underground IR HallNote Tunnel Access & Enlarged Assembly Area on SiD Side

Tunnel Entrance

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Heavy Equipment Transport in Japan

Advice to keep delivered loads < 80T will require both SiD and ILD to rethink their assembly model

A study of the exact routes, with bridges in tunnels, connecting the Kitakami site to the nearest port & railway depot are in progress.

10

SiD request to study alternate variant

Parallel hall at same grade with second 6-8m access shaft over SiD “garage”Tunnel grade increased & diameter reduced for “excavation only”

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BDS Commissioning

Three possible engineering options:

1. w/ Detector

2. w/o Detector, only QF1

3. w/o Detector, QD0 and QF1

Support wallShield wall with embedded:QD0+movers+cryo+powerSpecialized instrumentation, readout, …

Working decision to plan to commission w/ a detector

Revisit if detectors completion much later than accelerator

Will not plan for blocks, block storage, spare QD0s, separate cryo-system, etc.

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BDS Errata1: Common L* Strongly desired

BDS Group & AD&I management plan to insist on a

common L* for ILD and SiD

Example: Okugi-san finds, after tuning for 3.51m L* cannot find a solution for 4.5m L* better than:

13

BDS Errata2: “SB2009” IP Parameter Study has consequences in the extraction line

Studies of the small sig_x IP parameter set to recover

luminosity after N_b reduced x2 are beginning

3kW3kW

63kW17kW

Example:Power on last extraction line collimator before dump window

2007 RDR

2013 TDR

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BDS Errata3: Large L* Studies have begun

Multi-parameter problem: collimation depth, synchrotron radiation backgrounds, tunability, tolerances, etc. need study

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BDS Errata4: Suggestion from Brett Parker that QD0 design can be optimized for lower diameter package

Design work on eRHIC IR leads Brett to think, that with design work, it will be possible to increase the radius of the “bucking winding” and have the extraction line shoot the gap between main windings and the bucking winding resulting in a more compact package.

If possible, could possibly:• Reduce crossing angle:

- DID less important- Crab cavity less critical

• Reduce L*

Current design:“Bucking Winding” null fringe field on axis of extraction line and vice-versa

Hope for a conclusion by time of the Belgrade meeting