a study of proton-proton collisions at the lhc the ohio state university - task a.2 b.g. bylsma,...

35
A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore J.H. Gu, D. Larson, D. Herman, T.Y.Ling, C.L. Kim, P. Nylander, V.J. Sehgal, M. Studer,C. Rush

Upload: ann-washington

Post on 13-Dec-2015

218 views

Category:

Documents


3 download

TRANSCRIPT

Page 1: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

A Study of Proton-ProtonCollisions at the LHC

The Ohio State University - Task A.2

B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore,J.H. Gu, D. Larson, D. Herman, T.Y.Ling,

C.L. Kim, P. Nylander, V.J. Sehgal, M. Studer,C. Rush

Page 2: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

LHC Physics

Page 3: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,
Page 4: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

1 LHC Year = 105 pb-1

Page 5: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Collecting and Analyzing the Physics will be difficult ...

Muon Chambers will clearly play amajor role in LHC experiments

Page 6: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

H -> ZZ ->

Page 7: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

CMS Detector

Page 8: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

U.S. Endcap Muon System

Alabama, UC Davis, UCLA, UC Riverside,Carnegie Mellon, Fermilab, Florida,

Stoney Brook, Northwestern, Ohio State,Purdue, UT Dallas, Wisconsin

Page 9: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Endcap Cathode Strip Chambers

Page 10: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Electronics Overview

-Cathode Strip Chambers•6 layer modules•anode wire hits in azimuth direction•induced cathode strips in radial direction

Environment is Demanding•Singles Rate ~100 KHz/strip•Track Rate 300 KHz/chamber

- Main Functions of Electronics• generate trigger primatives for Level-1 - identify local charged track segments using both cathode and anode info• acquire precise muon information for offline analysis - cathode strips: precision azimuthal position from interpolation of induced strip charges - anode wires: precision timing; course radial position from ganged wires.

Page 11: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Momentum Resolution BMU/EMU Only

Momentum Resolution FULL CMS

Page 12: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

CSC Electronics Organization

• Cathode Preamp/Shaper Asic - Ohio State• SCA ASIC - U.C. Davis• Cathode Readout Control - Ohio State• Comparitor ASIC - UCLA/CERN• Cathode PC Board - Ohio State• Anode Preamp Shaper Disc ASIC - CMU/PNPI• Anode LCT ASIC - UCLA• Anode PC Board - UCLA/CMU/PNPI• Motherboard DAQ - Ohio State• Motherboard Trigger - UCLA• DDU Board - Ohio State• Low Voltage Distribution - Wisconsin

Page 13: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Front-End ElectronicsOrganization

2268 cathode boards1980 anode boards480 motherboards

Page 14: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Cathode Preamp/Shaper ASIC

•5 pole semi-gaussian shaper•100 nsec peaking time•1 pole/1 zero tail cancellation•return to baseline in 400 nsec

4 channel prototype - AMI 1.8 u

Page 15: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Noise

• 1 % at Landau Peak -> 150m Resolution• kT limited FET amplifier, 7000 e’s at 250 pF

Page 16: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,
Page 17: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

12 Bit Dynamic Range

• 8 bits for Landau peak• 2 bits for Landau tail• 2 bits for gas gain variation

Good Linearity

• < 1% from 0 to 15 MIPs

Page 18: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

BUCKEYE RADIATION TEST

Page 19: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

EMU Radiationand Charged

Track Backrounds

Page 20: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Front back

Figure 4. Latest prototype of 96-ch Cathode Front-End Board designed and producedat Ohio State in June 1999.

Buckeye

SCA

Comparator

Control FPGA

MUX

ADC

Channel Li nks

Cathode FE Board (July 1999)

• Buckeye Preamp/Shaper• Analog Storage + Controller• 12 bit ADC’s• Digital Trigger Primitives• 40 Mhz Word Transfer to Motherboard

Page 21: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Cathode FE Board Status

BUCKEYE Preamp/Shaper Finalized

• Improvements for 1999: rate sensitivity 15X better latchup fixed

• Final Prototype due from AMI late August• Preproduction run September/October

UC Davis SCA ASIC

• Improvements for 1999:

• New design with LVDS signals due AMI late Aug.• Preproduction run September/October

Much faster

400 nsec digitization

150 nsec digitization

Page 22: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Trigger 1/2 Strip Generator • 2nd Iteration Completed• Presently testing

• Hopefully Complete

OSU SCA Controller

• Uses XLINX FPGA• Design Completed

Board Layout

• Third Iteration works well• One more board before production

Page 23: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Analog Storage

Switch Capacitor Array (SCA)

•Free Running 50 nsec Samples•Charge stored in capacitor array•sample baseline (2 samples)•2-track resolution (3 samples)

Chambers are self triggered

• trigger logic determines good track in 500 nsec

Page 24: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Optical transceiver

DAQ Motherboard 1999

• Buffer/Event Builder/optical readout for all boards: cathode, anode, trigger• 8 16K Fifos, FPGA controllers• 75 MHz Optical Link

Control FPGAs

GLINKs FIFOs (16K,75 MHz)

CFEBconnectors

JTAG

CCB

TMB

ALCTB

CLCTB

CC TM

CLCT

ALCT

Page 25: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Counting House ElectronicsDDU Board

• Prototype, Final System with onboard pentium• HP GLINK (1.5 Gbit/s, 75 Mword/s)• 33 MHz PCI into Personal Computer

Page 26: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Cathode Integration Test

Page 27: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Results from Integration Test

Same noise at 40 MHZ as at 2.5 MHZ !

• Chamber and Electronics shipped to CERN this morning• Test Beam should start Mid August

Page 28: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

CERN Test Beam 1998First Test of FE Electronics

System: 3 96 channel anode FE Boards 3 96 channel cathode FE Boards 3 48 channel LCT trigger boards 1 trigger motherboard 1 DAQ motherboard

Slow Control/JTAG

Test at CERN H2 and X5 Beamlines

10-225 GeV Beam 740 GBq Cs 137 Source

Page 29: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,
Page 30: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

CERN H2 - 100 GeV , No Source

Page 31: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

CERN H2 - 100 GeV , No Source

Page 32: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Cathode Offline Resolution

Spacial Resolution: -Single Layer

- 6 layer chamber ~ 100 m

Time Resolution:

Strip Position (cm)

- single layer ~ 7 nsec

Page 33: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

CERN X5 - 100 GeV , Expected LHC Rate

Page 34: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,
Page 35: A Study of Proton-Proton Collisions at the LHC The Ohio State University - Task A.2 B.G. Bylsma, L.S. Durkin, D. Fisher, J Gilmore, J.H. Gu, D. Larson,

Conclusion

Schedule is Tight

US CMS Master L-1 Schedule -Start EMU installation 1/16/03 - Finish 8/29/04 EMU Electronics Schedule - Finish R&D by 12/1999 - Full pilot system 2/2000 - Construction 6/2000

Cathode Board on Schedule !

Realistic DAQ Motherboard built/tested !

Control Room DAQ boards in second design stage !

FE Board and ASIC ProductionShould Start on Time !