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INTERLABORATORY DEVELOPMENT OF AN INTEGRATED CIRCUIT FOR MULTIWIRE PROPORTIONAL CHAMBERS



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INTERLABORATORY DEVELOPMENT FOR MULTIWIRE OF AN INTEGRATED PROPORTIONAL CIRCUIT CHAMBERS SLAC PUB 986 EXPI November 1971 R S Larsen Stanford Linear Accelerator Center Stanford University Stanford California 94305 1 Introduction The corresponding waveforms are shown in Fig 2 The main points are that the propagation delay to the FAST output is shown as 5 40 ns the shaped outputs are shown as 30 10 ns the monostable delay is shown as 100 ns to 10 ps adjustable by external RC and the monostable recovery time is shown as I the output pulse length These various specifications are included in the summary of Table I In October 1970 a small group met at the Lawrence Radiation Laboratory in Berkeley to discuss the possibility of collaborating on the development of a special integrated circuit for proportional wire chambers Attendees of this initial meeting were H Steiner and F Kirsten of LBL M Atac of NAL R Lanza of MIT A Minten of CERN and J L Pellegrin and the writer of SLAC It was decided to organize a more general followup meeting in conjunction with the Nuclear Science Symposium in New York in November 1970 H Steiner mailed invitations to all known interested laboratories and also to two semiconductor manu facturers Fairchild Semiconductor in Mountain View California and Motorola Semiconductor in Phoenix Arizona 3 Interpretation The two day meeting held on November 2 3 1970 was attended by about 60 people from essentially every major laboratory including CERN The first day was devoted to formal presentations and the second to a roundtable discussion involving manufacturers representatives together with several laboratory representatives The final consensus of the New York meeting was that a subgroup should be formed to produce a specification with which to solicit manufacturers proposals Thus immediately after the New York meeting a subcommittee met at LBL to consolidate a specification Participants in this effort were M Atac NAL H Steiner and F Kirsten LBL I Pizer and F



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