FP420 Infrastructure in LHC

1. FP420Infrastructurein LHC FP420 @ UTA 27-Mar-2007

2. Services and Instrumentation • Tunnel Structure Working Group • Specify requirements for cabling and piping • Launch integration study in LHC • Schedule pre-installation of services • Reserve installation space • Distances detector to near electronics/supplies • possible locations • Undertake radiation calculations for FP420 sector • Cryostat and detector shielding • Select adequate instrumentation • Radiation issues D. Swoboda FP420 @ UTA

3. Tunnel Structure Working Group • 1st meeting on 8 Feb 2007 • Brainstorming session • Present: Detlef, Henning, Paolo, Ada, Peter, Krzysztof, Andrew, Cinzia • List of services and some volunteers identified • Suggested to split by sub-system; i.e. • Detectors • Alignment • Positioning system • Cooling • General power • HV/LV • … D. Swoboda FP420 @ UTA

4. Services Inventory D. Swoboda FP420 @ UTA

5. Sub-systems To be completed D. Swoboda FP420 @ UTA

6. Service locations near FP420 • Tunnel wall above the QRL. The space reserved for electronic boxes could eventually be used for electronics/power supplies. The reserved cross-section is 400 x 320 mm (H x W). However, additional radiation shielding would certainly be required in these locations. • Underneath adjacent magnets. Throughout the LHC tunnel the space underneath the magnets, mainly in the arc regions has already been reserved for electronics instrumentation because of the relatively low radiation dose. • Tunnel wall inside. A proposed alternative is the excavation of cavities on the tunnel wall on the “transport” side. A 1st inquiry has shown that holes of 75 cm diameter and 100 cm depth could be drilled [ ]. This solution seems to be theoretically feasible but would also require a good understanding of the radiation level at this location. • Support beams of cryostat. Support beams could receive openings to house custom electronics. Probably adequate for trigger devices requiring very short cable length. D. Swoboda FP420 @ UTA

7. Services space (1) We could drill 'cores' through the concrete lining and into the rock up to a depth of 1metre. We would then insert a steel pipe and grout it into position. The maximum finished internal diameter is approx. 75cm. Assuming no services need to be diverted, no water ingress problems, and the core is at around 1metre above the tunnel floor, an approximate budget cost is :13,000chf per hole = 24no. * 13k = 312,000chf. D. Swoboda FP420 @ UTA

8. Services space (2) D. Swoboda FP420 @ UTA

9. Services space (3) D. Swoboda FP420 @ UTA

10. Services Space (4) • Available Space • In the region of interest considerable space is already reserved for survey and vacuum instrumentation. • The vacuum installations are mounted in steel frames of 350 mm height. But the total height underneath the magnets is ≥ 400 mm. • The free length available varies but is at least equivalent to 1VME crate • The closest distance from FP420 is always less than one magnet length but limited to a couple of crates. • Required Space • A 6U VME Fantray will have the following outside dimensions: • 482,6mm (incl. 19" rack-mounting profile) x 352mm (8U) x 553mm (WxHxD). • Required at each FP420 station are 2 VME crates for Si-3D power supplies. D. Swoboda FP420 @ UTA

11. FP420 Services Routing LHCf implementation D. Swoboda FP420 @ UTA

12. FP420 BPM requirements 0 0 D. Swoboda FP420 @ UTA

13. Electrostatic pick up (buffer Amp required) BW: 1 kHz – 200 MHz position resolution:10 μm current resolution: 12 mA Button pick up BW: 1 kHz – 200 MHz position resolution: 10 μm current resolution: 12 mA BPM Technologies • AM, PM readout electronics, digital readout electronics • BW: 1 kHz – 200 MHz • position resolution: 10 μm • current resolution: 10 mA • BW: 200 MHz, CMRR: ~ 50 dB @ 100 MHz Courtesy: Marek GASIOR for BDI-PI section D. Swoboda FP420 @ UTA

14. BPM additional info • LHC BPM, BLM positions • BPM dwn stream @ Q11 • BPM up stream next Q10 • BLM can be mounted on feet supported by FP420 cryostat structural beams. • Tunnel instrumentation for BPM • Pure analog electronics with Laser diode for transmission. • Data already pulse width encoded • BPM type, electronics resolution • LHC electrostatic type: • With multi bunch measurement: accuracy ~ 100 micron, resolution 2 - 5 micron. • With b-b measurement: accuracy ~ 200 micron, resolution ~ 50 micron. • W. Herr for info on simulation for b-b variation. • Static vs. inductive = question of development time; i.e. easier for static. D. Swoboda FP420 @ UTA

15. BPM workshop • Place: CERN, Bldg. 926-1-039 • Date: 19 April 2007 • Scope: assess adequate technology for FP420 requirement • Criteria: accuracy, resolution, acquisition speed (b-b) • Concept of alignment monitoring and detector positioning • Development time/cost • Resources; i.e. available experts for mechanical layout, integration, electronics • Invited: D. Swoboda FP420 @ UTA

16. FP420 BPM WS agenda • Indico : http://indico.cern.ch/conferenceDisplay.py?confId=14310 • Agenda: • Welcome address D. Swoboda. • Introduction to FP420 B. Cox • Requirements for FP420 alignment BPM C. da Via • Results of investigations and studies on FP420 alignment and detector positioning systems J. Pater • Beam Position Monitor Designs L. Soby • Signal Processing for Beam Position Monitors M. Gasior • FP420 detectors mechanics D. Datolla • FP420 Hamburg beam pipe K. Piotrzkowski • Conclusions NN Draft proposal D. Swoboda FP420 @ UTA

17. Interlocks • Risk analysis for beam accident scenarios • Fast movement of closed orbit • Control failure of detector positioning system • Discussion launched for all LHC experiments with LHC machine • WS planned for June 2007 D. Swoboda FP420 @ UTA