ILC 07 Talk ILC The International Linear Collider

ILC 07 Talk ILC – The International Linear Collider Project Study of Si. PMs Detection Signal Uniformity Across Various Scintillator Tiles Keith Drake, Tera Dunn, Jack Gill, Maria Person Gulda, Uriel Nauenberg, Gleb Oleinik, Joseph Proulx, Elliot Smith, Paul Steinbrecher, Jonathan Varkovitzky Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project We measured the pulse height performan of various Si. PMs; from CPTA, Hamamatsu We measured the pulse height due to a beta emitter radioactive source located in various positions on a tile. The Si. PM is located at the center of the tile touching the face of the tile. Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project The cast tile is 5 x 1. 0 cm 3. The scintillator tile surface is polished and covered with Radiant Mirror reflecting paper. The extruded tile is 5 x 1. 0 cm 3. The scintillator tile surface is not polished but is covered with Radiant Mirror reflecting paper. We also considered the case where the edges of the tile is painted with reflective paint. Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project Measurement of CPTA Si. PMs Used light from a photo diode + nd filter 1 photoelectron Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project Measurement of Hamamatsu Si. PMs 2 photoelectrons Gain ~ 1/5 of CPTA better resolution 7 photoelectrons Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project Signal Comparisons, Same Time Intervals ext. scint. with painted sides noise Lo Th we re r sh ol d cast scint. ext. scint. Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project In 10 -13 Coul. Cast Scintillator Tile 5 x 5 x 1. 0 cm 3 8. 23±. 01 8. 24±. 01 8. 26±. 01 8. 24±. 01 8. 23±. 01 8. 27±. 01 7. 88±. 01 8. 26±. 01 8. 25±. 01 8. 27±. 01 8. 24±. 01 8. 22±. 01 8. 24±. 01 wrapped in Radiant Mirror paper Radioactive 38 Sr 90 Source Located in 15 positions 8. 19±. 01 SIPM Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project Extruded scintillator Tile 5 x 1. 0 cm 3 In 10 -13 Coul. 7. 84±. 01 wrapped in Radiant Mirror paper 7. 87±. 01 radioactive 38 Sr 90 source located in 15 positions 7. 85±. 01 7. 86±. 01 7. 87±. 01 7. 85±. 01 7. 87±. 01 8. 05±. 01 7. 88±. 01 7. 87±. 01 7. 85±. 01 7. 88±. 01 sipm Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project Extruded scintillator with painted sides Tile 5 x 1. 0 cm 3 wrapped in Radiant Mirror paper radioactive 38 Sr 90 source located in 15 positions In 10 -13 Coul. 7. 79±. 01 7. 83±. 01 7. 81±. 01 7. 80±. 01 7. 77±. 01 7. 79±. 01 7. 83±. 01 7. 79±. 01 7. 82±. 01 7. 80±. 01 7. 79±. 01 7. 76±. 01 7. 82±. 01 sipm Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project An Oddity on Noise Rates 527 hz 28 hz 61 hz Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project Future Measurements Ø Have 2 x 2 mm 2 units from CPTA to test Ø Additional 1 x 1 mm 2 units from Hamamatsu and CPTA Ø Additional extruded tiles to check for uniformity Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project Signal Comparisons, Same Time Intervals Polished Cast 1. 2 cm thick Extruded 1. 0 cm thick Need lower discriminator level Colorado Univ. – Boulder, May 2007 Noise

ILC 07 Talk ILC – The International Linear Collider Project Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project Results from Electromagnetic Shower Simulations Location of H Matrices . Interpolate H Matrices . . . 20 Ge. V Photon Location of Shower Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project 5 cm Worst separation 1. 25 cm ·· · φ· ····· 0 0. 5 1. 0 0. 25 0. 75 θ Best separation Colorado Univ. – Boulder, May 2007

ILC 07 Talk ILC – The International Linear Collider Project Result from Electromagnetic Shower Simulation (3 layers 6, 8, 10) Number of events with Chi-Square greater than No interpolation Interpolating No. of Events χ2 Colorado Univ. – Boulder, May 2007 χ2

ALCPG-Victoria ILC – The International Linear Collider Project Results from Electromagnetic Shower Simulation 1 st layer 20 th layer Colorado Univ. – Boulder, May 2007

ALCPG-Victoria ILC – The International Linear Collider Project Colorado Univ. – Boulder, May 2007

ALCPG-Victoria ILC – The International Linear Collider Project Colorado Univ. – Boulder, May 2007

ALCPG ILC – The International Linear Collider Project Modules Each module = ~12 tons Colorado Univ. – Boulder, May 2007

ALCPG ILC – The International Linear Collider Project Computer Simulation Propagation of charged tracks from the tracker into the calorimeter Colorado Univ. – Boulder, May 2007

ALCPG ILC – The International Linear Collider Project Simulation 1/2 Xo Colorado Univ. – Boulder, May 2007

ALCPG ILC – The International Linear Collider Project Simulation 3/4 Xo Colorado Univ. – Boulder, May 2007

ALCPG ILC – The International Linear Collider Project Simulation 1 Xo Colorado Univ. – Boulder, May 2007

ALCPG-Victoria ILC – The International Linear Collider Project Colorado Univ. – Boulder, May 2007