17-january-2002
1) Composition of the collaboration
The composition of the collaboration has been updated with reference to the CERN Grey Book . The following Institutes, which participated to the Technical Proposal, have left TOTEM: University of Nagoya, University of Yokohama and University of Ohmiya and France Palaiseau. The addresses of Grenoble and Pisa must be corrected Risto Orava from Helsinki Institute of Physics (HEP) sent a letter expressing his interest in joining TOTEM collaboration. HEP will work on common project CMS/TOTEM for Forward Physics and before to joining officially the collaboration they will present relatively soon a proposal on their contribution to TOTEM. Ralf Herzog of ILK Institute in Dresden sent a letter asking to join officially TOTEM. They are already in RD39 working on cryogenics and are interested to use their know-how in TOTEM, on the subject of the Roman Pots. ILK is formally accepted in the collaboration. Czech Institute is also interested to enter in the collaboration. J.P. Guillaud from LAAP Annecy join TOTEM on personal basis. A CERN-TOTEM group, lead by Karsten Eggert has been created at CERN in EP division. Karsten will ask CERN to contribute to TOTEM with Fellows and Students. Karsten wishes to reactivate some Felix collaborators for the TOTEM physics. Marco Oriunno has been appointed as GLIMOS of the experiment.
2) Web Page
Valentina Avati showed the skeleton of the Web page and she will be the entry point for any kind of modification with the help of Ulla Genoud. J.P. Guillaud proposed a logo which was accepted with minor modifications.
3) CMS Integration
A letter from Albert De Roeck and Karsten has been sent to CMS, resuming the results of a common workshop on diffractive physics. They propose to set up a common group CMS/TOTEM on diffractive physics. The objectives of this group are the study of installations of further Roman Pots at ~200 to 400 m, a common design of T2 inelastic detector suitable for diffractive physics, and a stronger integration of Trigger/DAQ between CMS and TOTEM.
4) Roman Pots Meeting
The first meeting on Roman Pots, gathering people from TOTEM and the machine, will be held on 18th January. These meetings every two months will address all aspects of the integration of the Roman pots into the machine. Daniela Macina from EST will chair it (see minutes). Andre Verdier will be the contact person to the machine for the optics. The meeting reports directly to LEMIC and is open to all the other experiments as observers. Only the topics related to the design of Roman Pots will be here discussed whereas all the aspects related to T1 and T2 will be discussed in the CMS/TOTEM Beam pipe Working Group. TOTEM collaboration clearly states that the design of the Roman Pots will not be outsourced to LHC and EST Division but TOTEM keeps the full responsibility of the project with the collaboration of the other divisions ensuring the full compatibility with LHC. A workshop collecting the present technologies for Roman Pots in other experiments should be organized, before to launch the design for TOTEM. A preliminary meeting will be held early march.
5) Vacuum chamber in the T2 region and New T2
The design of the vacuum chamber for CMS/TOTEM has been presented. The central part of the beam pipe (from IP to 10.7mt) doesn't present major concerns for T1. At 11mt, the presence of an expansion bellow is detrimental for the T2 acceptance and some action must be done in order to decrease the material budget. Concerns on the shape of the beam pipe between 13mt and 15mt have been expressed but in order to take clear action a better understanding of T2 is vital. The new T2 should be radiation hard and access etavalues up to 8, in order to be suitable for diffractive physics. Many complications arise to fulfill the constraints. Comments have been made in the direction not to give up at the moment on T2, as it has been described in the Technical Proposal. The new layout of T2 will be discussed in the very near future and new propositions will be taken in account.
6) Simulation of the pot detector acceptance and radiation
V. Avati with the help of A.Verdier will perform simulations on the Roman Pots acceptance. M.Huhtinen and N. Mockov will help in the simulation of radiation background for the Roman Pots. Simulation of T1 and T2 are required. The main activities carried out in Rome have been presented by G.Matthiae: acceptance of Roman Pots in parallel with Verdier and Avati at CERN, RPC optimization, effect of magnetic field on trigger efficiency and vertex reconstruction.
7) Simulation of the T1 and T2 regions
Riccardo Capra is setting up T1/T2 simulation with OSCAR software including the description of the vacuum chamber. This will allow the optimization of T1 and T2. The geometrical acceptance of the telescope has been shown.
11) Preparation of the TDR
The technical Design report must be completed by October 2002 having a draft in summer 2002. The TDR must include details on T1, Roman Pots, and Trigger/DAQ. T2 will not be described in details since a new layout wouldn't be agreed but could be described later on with an appendix to the TDR. G.Matthiae will prepare an Index and V.Avati will take care to assembly the contribution in text format with LateX. The TOTEM referee must be contacted.
12) AOB
The different positions of the Roman Pots have been discussed: RP1 (90mt) must be better understood RP2 (145mt) must be as close as possible to D2 RP3 (176mt) as close as possible to Q5 to maximize the lever arm RP4 (~200mt) This Roman Pot station has not presented in the Technical Proposal but this position along the machine is considered potentially interesting for diffraction. Discussions about a station in the cold arc (~400m) where the dispersion is large should start with the machine groups.
