Mandate Priorities Other tasks Membership Forthcoming reports to CTC The MDI Working Group Mandate Priorities Other tasks Membership Forthcoming reports to CTC Lau Gatignon, 27-08-2009 MDI - Mandate, members, priorities

MDI - Mandate, members, priorities Role of the MDI The MDI is the part of the CLIC facility (approximately) inside the detector cavern, i.e. the area in which there is a strong coupling of technical subsystems of the machine and of the physics detectors. The lines for the spent beams shall also be considered part of the MDI. Lau Gatignon, 27-08-2009 MDI - Mandate, members, priorities

MDI - Mandate, members, priorities In general the CLIC Machine Detector Interface (MDI) Working Group shall provide a meeting forum between people working on the CLIC accelerator and people working on the CLIC physics detectors. For this purpose the WG shall have permanent members from both study teams. For certain subjects of more general interest the WG shall propose speakers for CLIC Friday meetings or the LCD meetings. The MDI working group shall oversee the detailed technical work needed for the conceptual design (CDR) of the MDI until end 2010 and later for the detailed technical design phase (TDR). The MDI WG is responsible for documenting the concept of the accelerator components in the CDR write-up. Some of the technical work shall be elaborated within the MDI WG, but most results will be obtained in other WGs (beam dynamics WG, LCD, CES WG, Stabilization WG) The MDI WG reports to the CTC and to LCD. Lau Gatignon, 27-08-2009 MDI - Mandate, members, priorities

MDI - Mandate, members, priorities Highest priority for the work until end 2010 are those subjects linked to the “CLIC critical feasibility items”, nota bene: Choice of the magnet technology for the FF magnets Integration of these magnets into the detectors, and their alignment Feasibility study of sub-nm active stabilization of these magnets Luminosity instrumentation Spent beam disposal Beam background backsplash from the post-collision collimators and dumps into the detector Intrapulse-Beam feedback systems in the interface region The MDI WG shall respond to the cost WG on request. Lau Gatignon, 27-08-2009 MDI - Mandate, members, priorities

MDI - Mandate, members, priorities Examples of further items that will be discussed in the MDI WG: Issues where the beam delivery system (BDS) influences the beam/background conditions for the detector Issues where the BDS physically impacts on the detector Beam background and its impact on the forward (det.+accel.) elements, including backsplash of background particles from one hardware element to the surrounding elements Beam pipe, beam vacuum and vacuum infrastructure in the interface region Radiation environment and radiation shielding in the interface region Cryogenic operational safety issues in the interface region Magnetic environment in the interface region (shielding of FF quadrupole, correction coils, anti(-DID), stray fields from the detector, etc.) Overall mechanical integration (including the routing of services) in the interface region Pull-push elements and scenarios (detector-to-detector interface) Cavern layout and services (handled principally under CES WG) Lau Gatignon, 27-08-2009 MDI - Mandate, members, priorities

MDI - Mandate, members, priorities Lau Gatignon, 27-08-2009 MDI - Mandate, members, priorities

MDI - Mandate, members, priorities Lau Gatignon, 27-08-2009 MDI - Mandate, members, priorities

MDI - Mandate, members, priorities ORGANISATION: Typically I propose to have a full meeting every month, If necessary additional meetings in case those are needed to meet specific deadlines. Occasionally restricted meetings could be organised with working group leaders, in particular if these deadlines concern resources. The next deadline is a report to the CTC on what can be achieved and what cannot be done for the CDR with the resources availabe and what extra resources are required. Report on October 6th. For that reason I propose to have a next MDI meeting in the second half of September, e.g. Friday 25th of September 14 PM? Lau Gatignon, 27-08-2009 MDI - Mandate, members, priorities