Dual readout calorimeter for Cep C Franco Bedeschi
Dual readout calorimeter for Cep. C Franco Bedeschi CDR International Review, Beijing, September 2018 OUTLINE v Basic requirements v Detector description v Detector performance v IDEA implementation v Future work CDR Review, Beijing, Nov. 2018 1 F. Bedeschi, INFN-Pisa
e+e- HZ physics constraints v (*) LHC may observe these channels with similar ot better precision before Cep. C CDR Review, Beijing, Nov. 2018 2 F. Bedeschi, INFN-Pisa
e+e- Z/WW physics constraints v Additional EW physics drivers: Ø High precision acceptance determination Ø Good e/g/p 0 discrimination CDR Review, Beijing, Nov. 2018 3 F. Bedeschi, INFN-Pisa
Other drivers Z t+tt+ r+n p+p 0 n min. Dp+g @ 2 m Dg @ 2 m v p 0 important in tau and HF physics No p 0: 1 p 0 : 2 -3 p 0: 35% t l (e, m) nn + 20% t (1, 3)p± ln 28% t (1, 3)p±p 0 ln 10% t p± (2, 3) p 0 ln Ø High granularity/Pre-shower p 0 identification Ø Overlap with p+ may require longitudinal segmentation FCC week, Amsterdam, April 2018 4 F. Bedeschi, INFN-Pisa
Dual Readout calorimeter v Dual Readout Calorimeters main features Ø Designed to optimize EM, hadronic and jet resolution Large sampling fraction for good EM resolution Event by event correction for EM fluctuations in showers and jets Ø Intrinsic transverse granularity up to 1 -2 mm Ø Potential for longitudinal segmentation with timing or specific fiber geometries Ø Particle ID capabilities Ø Fast detector response Ø All electronics in the back simplifies cooling and access CDR Review, Beijing, Nov. 2018 5 F. Bedeschi, INFN-Pisa
Basic configuration v Alternate clear and scintillating fibers in metal matrix v Scintillating fibers sensitive to all charged particles v Clear fibers sense only Cherenkov light Ø Mostly electrons and positrons CDR Review, Beijing, Nov. 2018 6 F. Bedeschi, INFN-Pisa
Working principle v Measure simultaneously: Ø Scintillation signal (S) Ø Cherenkov signal (Q) v Calibrate both signals with ev Unfold event by event fem to obtain corrected energy CDR Review, Beijing, Nov. 2018 7 F. Bedeschi, INFN-Pisa
Performance EM v Use test beam data to tune simulation v Use simulation to correct for lateral leakage CDR Review, Beijing, Nov. 2018 8 F. Bedeschi, INFN-Pisa
Radial shower profile v Test beam data CDR Review, Beijing, Nov. 2018 9 F. Bedeschi, INFN-Pisa
Radial shower profile v Test beam tuned simulation 50 Ge. V electrons CDR Review, Beijing, Nov. 2018 100 Ge. V p 0 10 F. Bedeschi, INFN-Pisa
Performance HAD v Use test beam data to tune simulation v Use simulation to correct for lateral leakage v 81 and 91 Ge. V jet separation CDR Review, Beijing, Nov. 2018 11 F. Bedeschi, INFN-Pisa
Particle ID v Test beam Hadrons v Test beam tuned simulation Mu v 80 Ge. V electron proton separation Electrons Ø Rejection power 600 @ 98% efficiency S+Q S Q CDR Review, Beijing, Nov. 2018 12 F. Bedeschi, INFN-Pisa
IDEA implementation v Calorimeter outside thin coil v Pre-shower in front Ø Improve p 0 ID Ø Improve acceptance determination CDR Review, Beijing, Nov. 2018 13 F. Bedeschi, INFN-Pisa
IDEA implementation v Projective geometry v Full coverage v Wedge geometry CDR Review, Beijing, Nov. 2018 14 F. Bedeschi, INFN-Pisa
Readout v Dual layer Si. PM readout Ø Avoids optical cross-talk Ø 3 rd test beam in progress CDR Review, Beijing, Nov. 2018 15 F. Bedeschi, INFN-Pisa
Readout v Group Si. PM to reduce numbers of channels Ø 8 fibers/channel 5. 6 mm granularity Ø Parallel to serial readout ASIC under study Si. PM ASIC Output FPGA CDR Review, Beijing, Nov. 2018 16 F. Bedeschi, INFN-Pisa
Future work v Physics benchmarks with full simulation v Mechanics: Ø Metal matrix technology Ø Fast module assembly Ø Calorimeter support v Electronics Ø Si. PM readout optimization (pixel size and x-talk) Ø Define readout chain ASIC selection or development Signal processing on detector Readout and back-end design Ø Explore timing for longitudinal information CDR Review, Beijing, Nov. 2018 17 F. Bedeschi, INFN-Pisa
Backup BAC KUP CDR Review, Beijing, Nov. 2018 18 F. Bedeschi, INFN-Pisa
e+e- operation modes v Wide range of running conditions at Cep. C Ø Z pole (90 Ge. V): ~ 10 ns between beam crossing High luminosity O(1035) Ø ZH (250 Ge. V): ~ 1 ms between beam crossing Moderate luminosity - O(1034) CDR Review, Beijing, Nov. 2018 19 F. Bedeschi, INFN-Pisa
Cep. C, FCC, ILC, CLIC luminosity comparison Z WW ZH 100 x. LEP FCC SR power/beam < 50 MW Cep. C SR power/beam < 30 MW INFN Town Meeting, Roma 2018 20 F. Bedeschi, INFN-Pisa
2 T solenoid v Two options: Ø Large bore (R=3. 7 m) – calorimeter inside Ø Smaller bore (R=2. 2 m) – calorimeter outside Thick calorimeter Thin (30 cm): total = 0. 74 X 0 (0. 16 l) at q = 90º CDR Review, Beijing, Nov. 2018 21 F. Bedeschi, INFN-Pisa Courtesy of H. ten Kate et al. Preferred: simpler/ Extreme EM resolution not needed
Calorimeter Courtesy of DREAM/RD 52 v Copper dual readout calorimeter Ø Demonstrated EM resolution Ø Observed Had resolution dominated by lateral leakage (~6%) CDR Review, Beijing, Nov. 2018 22 F. Bedeschi, INFN-Pisa
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