1. Interface of FP420 to LHC FP420 meeting 28-Sep-2006

2. 28-Sep-2006FP420 work package Detlef Swoboda2 Abstract  The purpose of this note is to define a Work Package for the activity related to the FP420 experiment R&D and executed by the TS/LEA Group in its capacity of coordinating the LHC experiment-machine interface.

3. 28-Sep-2006FP420 work package Detlef Swoboda3 Circulation and Approval

4. 28-Sep-2006FP420 work package Detlef Swoboda4 DELIVERABLES FROM TS/LEA  Coordination of the activities related to development and integration of the detector infrastructure in the LHC machine. In particular this concerns the interfaces between detector and machine as well as development work done by different CERN groups.  In this respect LEA will act as liaison between the FP420 collaboration and the groups concerned.  The work package described in this document can be separated into two distinct groups of activities:  1.General services infrastructure  2.Specific machine interfaces and modifications  Allocation of space as well as installation planning is tributary to specification of required systems.  Until advanced conceptual definition of the required services it appears extremely difficult to allocate space and estimate installation times.  The list below itemises the basic tasks and deliverables required for the integration of the FP420 experiment in LHC. TS/LEA is responsible for the coordination of the machine interface and the link person to FP420 and the CERN groups is D. Swoboda.

5. 28-Sep-2006FP420 work package Detlef Swoboda5 General Services The FP420 detectors will be located at a distance of 420 m from IP1 and/or IP5. In the current LHC layout this area is not equipped with the required general services. LEA will therefore  Assist the FP420 collaboration to define in detail the instrumentation and services needed in these areas.  Transmit the demands to the relevant CERN services groups.  Assist with the working out of the installation procedure and schedule.  Follow up the installation activities. A short list of instrumentation and services concerned is given below: 1.Cables (LV,HV, electrical grid, communication, collimator control) These services will be organized with the TS-LEA group. 2.Optical fibers (RO, TTC, BST, other) These services will be organized with the TS-EL group. 3.Power Supplies (LV, HV) These services will be organized with the PH-ESS group. 4.Pipes (cooling, gas) These services will be organized with the TS-CV group. 5.LHC instrumentation These services will be organized with the relevant AB groups.

6. 28-Sep-2006FP420 work package Detlef Swoboda6 Interfaces The FP420 setup will replace part of the LHC machine; i.e. two or four connection cryostats. This requires substantial modifications of beam pipe sections, cryostat and ancillary equipment.  LEA will by mandate of the FP420 collaboration closely interact with the CERN groups which will be in charge of these crucial developments and assure that the requirements for the experiment can be met.  LEA will also assist with the working out of the installation procedure and schedule and follow up the installation activities.

7. 28-Sep-2006FP420 work package Detlef Swoboda7 Vacuum  Design of experiment specific vacuum sector.  The project includes the design of the warm vacuum pipe sector with the necessary equipment like gauges, pumps and valves. The CERN group in charge is AT-VAC.  Coordination of manufacturing and installation will be shared between AT-VAC and TS-LEA.

8. 28-Sep-2006FP420 work package Detlef Swoboda8 Cryostat  FP420 requires a full redesign of the connection cryostat. In particular access will be required to the detector modules. The warm beam pipes also necessitate the installation of cold/warm transition modules at both ends of the insertion whilst the continuity of the magnet services and cryogenics must be maintained. The design of the cryostat system to replace the interconnection module will be undertaken by TS-MME (Thierry Renaglia) in collaboration with AT-MCS (Thierry Colombet).  TS-LEA will participate in the coordination of manufacturing and installation

9. 28-Sep-2006FP420 work package Detlef Swoboda9 BPM  The FP420 experiment requires a very high resolution of the measurement of the particle beam position. The orbit of the particle beam will be measured with dedicated BPM. These instruments will have to be newly developed, fabricated and installed. The AB-BI group will be in charge of the task to propose a suitable BPM concept and take care of the design.  TS-LEA will participate in the coordination of manufacturing and installation and interface to AB/BI and AB/OP.

10. 28-Sep-2006FP420 work package Detlef Swoboda10 Detector Alignment  The FP420 detectors need to be extremely precisely positioned with respect to the particle beam. An online monitoring system of the detector alignment using novel technology will be validated and implemented with the participation of TS- SU.

11. 28-Sep-2006FP420 work package Detlef Swoboda11 Detector positioning system  The positioning system for the FP420 detectors will require a close cooperation with LHC collimator project.  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, 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.  The coordination of all the above activities shall be done in collaboration with the Machine Protection WG (MPWG) and FP420.

12. 28-Sep-2006FP420 work package Detlef Swoboda12 Radiation screens  The connection cryostat for the LHC includes substantial shielding (Pb-plates) to protect the downstream machine elements. These shielding will also be required for the FP420 sector. In order to determine the necessary shielding radiation studies will be necessary. The LEA group has the necessary expertise and resources to supply this calculation effort.  Design and manufacturing of these elements shall be part of the cryostat project.

13. 28-Sep-2006FP420 work package Detlef Swoboda13 MANPOWER ESTIMATES  In addition to D. Swoboda,  M. Gastal (planning,scheduling)  V. Talanov (radiation calculations) shall work on this Work Package from TS/LEA.

14. 28-Sep-2006FP420 work package Detlef Swoboda14 ORGANIZATION  The Work Package is managed by D. Swoboda.  C. da Via and K. Potter are the FP420 contact persons for the Work Package.  Purchasing of materials, tools and instrumentation directly related to the development of the project shall be discussed with the contact persons. The FP420 Collaboration shall reimburse purchased items which were previously agreed with the contact person  FP420 considers the Work Package to be of high priority. The project is eligible for the attribution of CERN-based students or associates.