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

Moving Hamburg pipe concept

CERN HPS-AFP Meeting, 15/3/2011 K. Piotrzkowski 2

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 3CERN HPS-AFP Meeting, 15/3/2011

From JINST 4 (2009) T10001

K. Piotrzkowski 4

Back in 2007… R&D for FP420

CERN HPS-AFP Meeting, 15/3/2011

K. Piotrzkowski 5

Back in 2007… R&D for FP420

CERN HPS-AFP Meeting, 15/3/2011

Results summarized in JINST 4 (2009) T10001

New design for pockets

Prototyping moving beam pipe in 2008

Prototyping moving beam pipe in 2008

Benoît FLORINS

First: Pre-machining pockets

New approach: Pockets produced by Electro-erosion

Prototyping moving beam pipe in 2008

Moving beam pipe prototypeUCLouvain

Two pockets laser welded: second for Cherenkov detectors is 30 cm long

Used for RF tests in Manchester

Moving pipe: Detector ‘box’

CERN HPS-AFP Meeting, 15/3/2011 K. Piotrzkowski 10

Thin 400 mm entrance and side windows

Moving beam pipe assembly

Moving beam pipe: Last prototype from 2009UCLouvain

• Improved laser welding + flatness measurements

Quality of pocket windowsUCLouvain

• Very good flatness measured : ±50 mm over full surface;

• And between two pockets !

Moving Pipe: Stage One Detectors at 220/240m

CERN HPS-AFP Meeting, 15/3/2011 K. Piotrzkowski 14

• 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

CERN HPS-AFP Meeting, 15/3/2011 K. Piotrzkowski 15

HPS Design Baseline?Guiding principle for Stage One – simple, robust and 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, Radiation hardness and activation, interlocks/emergency procedures, etc, etc) – let’s discuss after Mimmo’s talk

K. Piotrzkowski 16

Thin window size

CERN HPS-AFP Meeting, 15/3/2011

Higgs events @ 240m from P.Bussey

From HECTOR