MRPC-­‐TOF	  R&D	  status	
Tatsuya	  Chujo	  (Univ.	  of	  Tsukuba)	

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Members	
• University	  of	  Tsukuba:	  – T.	  Chujo,	  T.	  Nonaka	  (D1),	  K.	  Sato	  (B4)	  *,	  R.	  Koyama(M1)	  • Tsukuba	  Technology	  University:	  – M.	  Inaba	  • JAEA:	  – H.	  Sako,	  S.	  Sato	  • KEK:	  – K.	  Ozawa,	  K.	  Aoki	  *	  GraduaIon	  thesis	  in	  2016, presentaIon	  at	  JPS2016	  spring	  (poster	  session	  for	  undergraduate	  students)	  	  2	!/</.Q'GJ$+W%I+.',N$5

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4T. Chujo (U. Tsukuba)!

CollaboraOon	  with	  SONY	• ソニーイーエムシーエス株式会社
設計技術部門 電気CAE技術部	  – Modeling	  MRPC	  detector	  – ElectromagneIc	  ﬁeld	  cal.	  by	  solving	  Maxwell	  eq.	  numerically.	  
– ConsulIng	  of	  fast	  signal	  propagaIon	  in	  electrodes,	  cables,	  impedance	  matching,	  and	  actual	  test.	

5	An	  example:	  proposed	  modiﬁcaIons	  (SONY)	
Electric filed near electrodes（as a function of time）
Defaulthigh density of electric field on theedges of electrodesinterference

Modified (Ref. conductor)

Ref conductor, reduce the dispersion ofelectric filed small interference
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Merit・Lager amplitude
・Reduction of reflection
・Reduction of interference
between adjacent electrondes
Demerit・Reduce electrode area! width 24mm 8mm! reduction of efficiency.
Z'Proposed	  modiﬁcaIon（Dec.	  2015）	
Plan  ①：  Multi  layer  PCB

Plan  ②：  Patch  structure

・Electrodes  in  the  different  layer  of  PCB・GND  above  electrodes  ・Add  current  on  near-by  electrodes  (by  a  different  circuit)・electrode  pad:  24mm×24mm
・put  co-axial  connector  and  cables  on  each  padcloser  view

cross  section

GND※  co-axial  cablecross  section（image）
Electrode8	  Future	  Plan	  (SONY)	
• ConInue	  R&D	  with	  SONY,	  and	  test	  with	  actual	  detectors	  by	  building	  new	  proposed	  designs	  in	  2016.	  
• R&D	  key	  points:	  – Grounding,	  signal	  reﬂecIon,	  impedance	  matching,	  preamp	  design.	  
– build	  prototype	  will	  be	  tested	  at	  ELPH	  beam	  test	  in	  May,	  together	  with	  the	  planed	  MRPC	  prototypes.	

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New	  4	  stack	  prototypes	  in	  Tsukuba	  for	  ELPH	  test	  beam	  (K.	  Sato,	  R.	  Koyama,	  T.	  Nonaka)	

165	  micron,	  	  	  6	  gaps	  (default)	

148	  micron,	  	  	  6	  gaps	

128	  micron,	  	  	  7	  gaps	

104	  micron,	  	  	  9	  gaps	

90	  micron,	  	  11	  gaps	
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hL'</SG+.6''
99'Q"N$Medium	  area	  MRPC	  prototypes	

••••Two	  types	  (pad	  and	  slat)	  PCB	  have	  been	  made.	  
20	  cm	  x	  30	  cm	  PCB	  size	  To	  be	  build	  lager	  size	  4	  stack	  MRPCs	  and	  tested	  at	  ELPH.	  
It	  could	  be	  a	  prototype	  for	  E-­‐16.	  
12	Summary	  & plan	• Build	  several	  types	  of	  MRPC	  for	  ELPH	  test	  beam.	  
• Currently	  tested	  at	  cosmic	  ray	  at	  the	  test	  bench,	  Univ.	  
of	  Tsukuba	  (K.	  Sato).	  
• Started	  the	  collaboraIon	  with	  SONY	  (signal	  propagaIon	  and	  design,	  etc.)	  • Plan	  in	  2016:	  – ELPH	  test	  beam	  in	  May,	  2016.	  
– Further	  R&D	  with	  SONY	  and	  M.	  Chiu	  (BNL)	  – Readout	  R&D	  using	  DRS4,	  and	  prototyping.	  
– Final	  design	  of	  MRPC	  for	  E-­‐16.	  	
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