From settles@mppmu.mpg.de Thu Jan 4 14:53:53 2007 Date: Wed, 20 Dec 2006 13:30:20 +0100 (CET) From: Ronald Dean Settles To: LC-TPC@desy.de Cc: LCTPC CB/TB combined list -- 'Keisuke FUJII' , A.F.Buzulutskov@inp.nsk.su, alexander.kaukher@desy.de, Anatoliy Krivchitch , Ariane Frey , bamberg@physik.uni-freiburg.de, Dan Peterson , David Nygren , Dean Karlen , desch@physik.uni-bonn.de, Harry van der Graaf , henning.schroeder@physik.uni-rostock.de, Ivor Fleck , jan.timmermans@nikhef.nl, Joachim.Mnich@cern.ch, jpmartin@lps.umontreal.ca, Leif Jonsson , lepeltier@lal.in2p3.fr, Luciano.Musa@cern.ch, Lucie.Linssen@cern.ch, Madhu Dixit , Michael.Hauschild@cern.ch, Paul.Colas@cea.fr, Peter Schade , Peter Wienemann , rickv@fnal.gov, Ronald Dean Settles , sawyer@phys.latech.edu, Stefan.Roth , Sugiyama Akira , Takeshi Matsuda , ties.behnke@desy.de, Y Gao , rolf-dieter.heuer@desy.de Subject: Summary update 16th WP phonemeeting 06/12/2006 Dear TPC friends, The summary of our last meeting #16 has been updated with Luciano's and Gerd's writeup on the planning/status of the LCTPC/LP1 electronics, including an attachment... Best wishes, Ron Summary update of the 16th WP meeting 06/12/2006 -------------------------------------------------- Present: Paul Colas Ralf Diener Madhu Dixit Michael Hauschild Martin Killenberg Leif Joensson Dean Karlen Vincent Lepeltier Jean-Pierre Martin Takeshi Matsuda (could hear, but no voice contact) Astrid Muennich Luciano Musa Dave Nygren Dan Peterson Peter Schade Oliver Schaefer Ron Settles Akira Sugiyama Jan Timmermans ...anyone forgotten? Agenda and Summary: -------------------- 1. News -a. Organization for our report at the Beijing tracking review; discussion of Takeshi's proposal for the presentations: ------- (quote)...The LC TPC collaboration may give following four talks, if time allows. We think that these four talks should be given by four people of the LCTPC collaboration. The titles are provisional. (a) Experimentation at ILC, and Requirements and Issues for LC TPC (b) Results of TPC R&D by the LC TPC collaboration (Existing Technologies and their status including test results, and results from simulations) (c) Future Plan of TPC R&D within the LC TPC collaboration (The EUDET project, the Large TPC prototype test and others) (d) Organization and Budget Plan of the LC TPC collaboration (in the closed session) ...(end of quote) ------- After the discussion at the meeting, it was decided put to split (b) and (c) into 2 talks each and to move "Organization of the LCTPC collaboration" from (d) to (a). This way there will be 5 talks in the open session and one or two in the closed. Two hours are planned for the open-session talks. The ambiguity as to whether the finances are presented in the open or closed session has now been resolved: they will be discussed in the closed session. (There is a remaining ambiguity as to whether they are included in the written report; we plan to not to that until our finances/manpower are better understood). -b.Meeting with Tsinghua U., 27.11.2006 Summary (between the ==== lines): =================== Present: Keisuke Fujii Yuanning Gao Jin Li: lijin@mail.tsinghua.edu.cn, lij@mail.ihep.ac.cn Yuanjing Li: gwxlyj@mail.tsinghua.edu.cn Yulan Li: yulanli@mail.tsinghua.edu.cn Takeshi Matsuda Luciano Musa Ron Settles Zhenwei Yang: yangzhw@mail.tsinghuaedu.cn Huanzhong Huang: huang@physics.ucla.edu Shaomin Chen: chenshaomin@mail.tsinghua.edu.cn Yinong Liu: liuyinong@mail.tsinghua.edu.cn The slides of all talks are located at http://www.hep.tsinghua.edu.cn/talks/TPCdiscussion/ 1) Overview talk by Ron on several LCTPC, LP and R&D issues. 2) A talk by Keisuke summarized the understanding of the achievable point resolution. 3) Takeshi presented some preliminary ideas for the LCTPC electronics that resulted from meetings with Hirokazu Ikeda and Akira Sugiyama at Kek on 24/25.11.2006 4) Luciano reviewed the parameters for the Alice TPC, its electronics and what is being planned for the LP electronics. This led into the discussion for the LCTPC electronics which is described under c) below. 5) Yulan Li summarized the activities at Tsinghua. One important development is the development of a prototype triple-Gem TPC with 30cm-diameter, 50cm-long with 2mm x 10mm. Signals (cosmics) have been seen on a scope and a DAQ system for reading 320 channels should be ready in ~1 month. Discussion: - Jin Li started the general discussion about the participation of the Tshighua University within the LCTPC collaboration. There are three aspects: a) how to continue with the Tsinghua TPC, b) how to join the LP work, c) how to work together within the LCTPC collaboration. - a) One suggestion was to compare measurements and simulations for different gases. Also the manufacture of Gem foils is being pursued in China, and all thought that this should continue (for example, with the application for Gem gating, for which simulations have to be done first). The Tsingua TPC has no magnetic field, so the possibility to run the chamber in the magnet at the cryo hall at Kek was discussed and found to be realistic. Plans will be made to do such tests sometime during the first half of 2007. - b) It was proposed that Tsinghua join the CDC/Philippine LP work on Gem panels for the Asian contribution. The idea is to produce Gem panels which fit into Dan Peterson's N-pane endplate (with N=7 probably). In this way different ideas can be tried out by different groups. The Asian work will be combined with the European/American work later. Coordinator for the Gem panels is Akira Sugiyama. More software development is required, for the LP and for the LCTPC. Track recognition, performance simulation, alignment are important tasks. Other software work for the LP can be found in the Project List LP TPC which is at http://www.mppmu.mpg.de/~settles/tpc/lp/wpmtg/Project_List4_LP_TPC.doc (e.g., slow-control system, DAQ system, event display). - c) One urgent task is to develop a concept for the LCTPC electronics. Luciano's presentation (see above) started the discussion which was continued the following morning between Keisuke, Takeshi, Luciano and Ron. These resulted in a 0th iteration for the concept of the LCTPC electronics which Luciano will write up and send around to the relevant people. The programmable preamp is well underway and next one has to understand the equivalent to the Altro-chip: 130nm technology, functionality needed, signal routing, etc. Luciano is setting up a design team in CERN which will start early 2007. The Tsinghua group would like to contribute by sending an expert to CERN early 2007 to join the team and is investigating how to realize this goal. ===================== -c. New collaborator: Lee Sawyer, Lousiana Tech. Lee is predominantly iterested in Gem detectors for the endcap tracker, and sees LCTPC as the best place to join and make contributions to the overall tracking and Gem technology. 2. WP meeting -a. LCTPC/LP1 electronics discussions. Brief summary by Luciano and Gerd Trampitsch on the report at the phonemeeting (between the ++++++ lines): ++++++++++++++ Development of the electronics for the LPTPC --- PASA A first prototype of a charge amplifier/shaper circuit, has been developed in the course of the year 2006. This circuit has the following characteristics: - process: IBM CMOS 130nm - nr. channels: 12 - conversion gain: 9.5mV/fC - equivalent noise charge: 270e (Cin = 10pF) - dynamics: 4600 - low-pass filter: 4th order - power consumption: 10mW - package: CQFP 144 We developed this circuit with the following objectives: 1) verify the suitability of the IBM CMOS 130nm process for low-noise analogue applications; 2) study the performance of a circuit that represents a first step, in terms of building blocks and architecture, towards a programmable circuit for the LPTPC. The results above indicate that both goals have been met and are very encouraging for the development of the final version. The next submission is planned for the 2nd quarter of 2007. Hereunder are the specification (UNDER STUDY) of the new circuit: - process: IBM CMOS 130nm - nr. channels: 16 - conversion gain: programmable in the range 10-30 mV/fC - dynamics: ~2000 - architecture: CSA + PZ cancellation + 2nd order low-pass filter (the filter has the function of limiting the bandwidth before ADC) - peaking time: programmable in the range 30-100 ns - decay time: programmable in the range < 1 microsecond --- ALTRO chip The ALTRO chip exists in two versions. The two versions differ in the ADC bandwidth. A polarisation current, provided for each channel by an internal resistor, defines the ADC bandwidth and power consumption. The polarisation resistor is divided in multiple taps such that only one metal layer has to be changed, in order to optimise the power consumption to the required bandwidth. These two versions of the ALTRO chip have been produced with maximum rates of 25MSPS (Engineering Run for ALICE) and 40MSPS (Multi-Project Run), and power consumption of 12.5mW and 43mW respectively. The resolution of the ADC as function of the sampling rate (Fs) and frequency of the input signal (Fin), for the two ALTRO versions, is shown in the figure in the attachment. About 125 ALTRO chips (2000 channels) of the 40MHz version are available for the LPTPC. A new production of 25-MHz ALTROs has the following costs: - wafers (minimum quantity 25 wafers): 66000 EUROs - packaging of 1000 chips (16000 channels): 4000 EUROs A new production of 40-MHz ALTROs has the following costs: - re-working of the mask set: 200000 EUROs - manufacturing and packaging of 1000 chips 20000 EUROs All prices quoted above are cost estimates and have to be confirmed by official commercial quotations. +++++++++++++++++++++++ Discussion: In general the proposal by Madhu and Jean-Pierre to digitize and not shape the signal with a fixed shaping time can be tested with the LP1 electronics as planned. Dave asked about only digitizing when needed to save power, and Luciano replied that the 1ms-on/200ms-off will already save enough power. Luciano is conferring the several groups (Klaus, Takeshi, Paul) about buying more channels (ca. 10**4) for the LP1 tests (see prices above). -b. LP1: see Dan's website http://w4.lns.cornell.edu/~dpp/linear_collider/LargePrototype.html Dan described his first iteration for a 7-panel endplate which results from discussions at Valencia and the 15th WP phonemeeting on 22.11.2006. There are questions about clearance for the outside panels and the support of the central panel. The exact size of the panels must be understood first. 3. AOB -a. Ralf Diener is setting up a TPC webpage for Eudet and is asking for feedback and ideas; see http://www.desy.de/~rdiener/files/EUDETPages-CallForInput.pdf It was discussed that a central page might be set up from which one can click on the logos of the Eudet page, the LCTPC page (www.lctpc.org) and the WWS page, to help keep thing centralized. Whatever we decide, a logo is needed for the LCTPC! All are invited to send in proposals! The three RCs will select the winner (procedure to be decided), who will get a prize (also to be decided, but something like a bottle of champagne). Send in your design a.s.a.p., so that we can make a selection! Timeline: before the yearend holidays start if possible... [ Part 2, "" Application/VND.MS-POWERPOINT 96KB. ] [ Unable to print this part. ]