Moving pipe: R&D+‘physics constrains’ K. Piotrzkowski ( UCLouvain )

1. Moving pipe: R&D+‘physics constrains’ K. Piotrzkowski (UCLouvain) Moving pipe development and prototyping so far Physics with detectors at 220/240m - moving pipe present baseline HPS-AFP Meeting, CERN, 15 March 2011

2. Moving Hamburg pipe concept Successfully used at HERA: Robust and simple design, + easy access to detectors Motorization and movement control to be cloned from LHC collimator design JINST 4 (2009) T10001 K. Piotrzkowski

3. From JINST 4 (2009) T10001 K. Piotrzkowski

4. Back in 2007… R&D for FP420 K. Piotrzkowski

5. Back in 2007… R&D for FP420 Results summarized in JINST 4 (2009) T10001 K. Piotrzkowski

6. Prototypingmovingbeampipe in 2008 New design for pockets

7. Prototypingmovingbeampipe in 2008 First: Pre-machining pockets Benoît FLORINS

8. Prototypingmovingbeampipe in 2008 New approach: Pockets produced by Electro-erosion

9. Movingbeam pipe prototype UCLouvain Used for RF testsin Manchester Two pockets laser welded: second for Cherenkov detectors is 30 cm long

10. Moving pipe: Detector ‘box’ Thin 400 mm entrance and side windows K. Piotrzkowski

11. Moving beam pipe assembly

12. Movingbeampipe: Last prototype from 2009 UCLouvain • Improved laser welding + flatness measurements

13. Quality of pocket windows UCLouvain • Very good flatness measured : ±50 mm over full surface; • And between two pockets !

14. Moving Pipe: Stage One Detectors at 220/240m • Pocket production well developed, man power and expertise still available • Meantime for HPS240 design one pocket design is considered for baseline; decision by end of March’11 • (Length of Cerenkov detectors should be minimized) • Torino group is pursuing idea of making the whole pipe by electro-erosion from one piece • PLAN: • Once the detector box dimensions; RF screen and bellow types are defined new production will be launched – we expect to have new fairly complete prototypes in Fall’11 K. Piotrzkowski

15. HPS Design Baseline? Guiding principle for Stage One – simple, robustand workable design (NB. Details of the pocket + detector box design could be different in Stage Two): • One ~45 cm long single pocket (~15cm tracker ~30cm timing) and one, common detector box • Use secondary vacuum – already 10-3 bar should be OK – controlled (common) environment – temperature/humidity • Thin windows of 300-400 mm , inner height ~10 mm, entrance/exit windows slightly bigger than in FP420 • Support table/LHC interface envelops – ‘final’ designs Full design developments + Integration aspects (vacuum, RF screens, BPMs, bellows, cooling, motorization, Radiationhardness and activation, interlocks/emergency procedures, etc, etc) – let’s discuss after Mimmo’s talk K. Piotrzkowski

16. Thin window size From HECTOR Higgs events @ 240m from P.Bussey K. Piotrzkowski