Movable beam pipe and NNC Study & prototype development Manchester 14/12/20091D. FP meeting

AFP NCC & Detector Station Manchester 14/12/2009D. FP meeting2

Cold/Warm Transition Manchester 14/12/2009D. FP meeting3

Manchester 14/12/2009D. FP meeting4 NCC Summary A full design of the new connection cryostat (NCC) to replace the present empty cryostat has been produced by EN-MME, based on LHC designs and standard components. The design has been reviewed by the relevant groups in the accelerator department and is estimated to cost 1.5 MCHF for assembly in CERN workshops. A final design effort of 6 months is required to produce and validate all manufacturing drawings according to the LHC QA procedures. The manufacturing time for the first cryostat is estimated to be about 1 year. Preliminary installation scenarios have been discussed with the LHC transport and installation responsible and an overall cryostat and room-temperature beam sector installation plan has been drawn up. The installation and commissioning of the detectors and services does not interfere with the modification of the LHC cryostat and creation of the room temperature beam sector.  These activities including installation of Hamburg beampipes can therefore be planned during scheduled LHC shutdown periods. A considerable amount of cabling between the detector location and the experimental area is needed for the vacuum and beam monitoring instrumentation as well as for the detector services.  This activity could ideally be carried out before the installation of the cryostat

Manchester 14/12/2009D. FP meeting5 Exchange of connection cryostat Time required for cryostat replacement:~ 5 months 1.Warm up 1 month 2.Replace CC~ 8 weeks a.Dismantle interconnect5 days b.Recondition interconnect5 days c.Install new cryostat5 days d.Interconnect cryostat5 days e.Internal leak test before1 week f.El. Test, alignment5 days g.Global leak test, pressure test3 weeks 3.Bake out 3 weeks 4.Cool down 1 month 5.Cold test 1 week Time required for cryostat replacement:~ 5 months 1.Warm up 1 month 2.Replace CC~ 8 weeks a.Dismantle interconnect5 days b.Recondition interconnect5 days c.Install new cryostat5 days d.Interconnect cryostat5 days e.Internal leak test before1 week f.El. Test, alignment5 days g.Global leak test, pressure test3 weeks 3.Bake out 3 weeks 4.Cool down 1 month 5.Cold test 1 week

Abstract The purpose of this note is to define a Work Package for the moving beam pipe activity related to the FP420 experiment R&D and executed by the EN/MEF Group in its capacity of coordinating and integrating the LHC experiment-machine interface. PREPARED BY : K. Potter D. Swoboda CHECKED BY : S. Baird R. Folch R. Losito M. Lamont E. Ciapala R. Jones J.M. Jimenez O. Bruning R. Jones Approved by : V. Vuillemin P. Collier J.-J. Blaising S. Myers S. Bertolucci FP420 movable beam pipe design, fabrication and installation in LHC Manchester 14/12/20096D. FP meeting

Scope This work package consists of the design, fabrication, test and installation of a movable beam pipe (Hamburg beam pipe) in the LHC machine at 220 m from the IP as well as at a later stage in the NCC (New Connection Cryostat) at 420m. Part of this beam pipe will have a reduced cross-section with a thin window to which the detectors will be attached. An important function of the beam pipe is to allow the integration of the detectors by providing precision alignment references and a mechanical support structure. The mechanical support of the beam pipe will be instrumented so as to allow a very precise lateral movement of the pipe during LHC operation in order to approach the detectors to the particle beam. The complete installation will consist of 4 Hamburg pipe sections to either side of IP1 and IP5; i.e. at 220 m and 420 m from IP1 and at 240 m and 420 m from IP5. Manchester 14/12/20097D. FP meeting

Positionning System The positioning system for the FP420 detectors will require a close cooperation with EN-STI and EN-MME groups relying on the experience of LHC collimator control system. As far as possible the motorization and control for the LHC collimators should be integrated in the movement system for the Hamburg beam pipe. The potential risks for the FP420 detectors due to beam accidents and the consequences for the machine need to be evaluated and safety procedures need to be implemented. In particular, a risk analysis addressing the following issues will be necessary: Evaluation of the possible accident scenarios. Evaluation of the consequences for the detectors and for the machine. Definition of the safety procedures to minimize the risk of beam accidents and the consequences both for the detectors and the machine (beam instrumentation such as BLMs and BPMs, interlocks, operation…). Simulation of the energy deposition on the thin window for the various beam accident scenarios. The results from the above studies shall also be used by FP420 as input for functional specifications of the control system. Manchester 14/12/20098D. FP meeting

HH pipe concept sketch Manchester 14/12/20099D. FP meeting

1st brain storming Manchester 14/12/200910D. FP meeting

Manufacturing Technology MaterialLN316 (forged?) Machiningfrom block Thin windowlongitudinal 150 micron transvers 500 micron Assemblyvacuum brazing Unit cost< 10 kCHF Manchester 14/12/200911D. FP meeting

Bellow Test Setup Parts required Assemble 2x VMAAA and 2x VMAAC with a transition pipe in between. Clamped to 2 end plates (End plates to be moved between Compressed bakeout state and Nominal operating state for each test. Test 1. Compressed bakeout state length VMAAA at 280mm and VMAAC 180mm. Test 2. Nominal operating state length VMAAA at 300mm and VMAAC at 200mm. Teflon sheet under feet to reduce friction. Dial gauge fixed onto opposite side of chamber to give an accurate reading of movement. 10kg Spring scale which is connected on one side to the transition pipe and the other to a 12mm threaded rod this is inserted into a fixed block which can be wound gradually so movement can be measured against the force required. Manchester 14/12/200912D. FP meeting

Bellow Test Assembly Manchester 14/12/200913D. FP meeting

Displaced chamber Manchester 14/12/200914D. FP meeting

Bellow Test Result mm Travel Force required (kg) Compressed bakeout stateNominal operating state Manchester 14/12/200915D. FP meeting

Deplacement Force Manchester 14/12/200916D. FP meeting

RF finger contact 5mm10mm15mm20mm25mm Relaxed state100%92%75%70% Nominal state100% Manchester 14/12/200917D. FP meeting

Preproduction Beam pipe WP Manufacturing technologies are available System should be assembled from standard LHC components Cost remains rather modest Schedule: design, production, test 2010 Installation 2011 Scope: demonstrate feasibility, transparancy to LHC use as detector test bed? Manchester 14/12/200918D. FP meeting