SBS Monte Carlo Update

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1 SBS Monte Carlo Udate Seamus Riordan University of Massachusetts, Amherst November 6, 13 Seamus Riordan SBS Weekly, Nov 13 SBS MC 1/1

2 Code Base/Infrastructure All code available at htt://solid.hysics.umass.edu/g4sbs.html Read access is oenly available Read/write access - sent your ublic key to me (instructions on above age) Requested a-sbs grou, SBS disk sace, farm roject Seamus Riordan SBS Weekly, Nov 13 SBS MC /1

3 VRYTHING HR IS PRLIMINARY AND A WORK IN PROGRSS Seamus Riordan SBS Weekly, Nov 13 SBS MC 3/1

4 Target Chamber Scattering chamber secs: Windows designed to match accetance of cryo-target exeriments Inner diameter of 1.41 m, outer m Window thickness 38 µm Seamus Riordan SBS Weekly, Nov 13 SBS MC 4/1

5 Target Cell SolidWorks ducational dition. For Instructional Use Only. Target cell secs: Dimensions given by Silviu Ustream wall 1 µm Downstream wall 15 µm Outer wall thickness 635 µm Seamus Riordan SBS Weekly, Nov 13 SBS MC 5/1

6 Udated G Configuration Got new layout from Al Detector stack now at 5 itch Seamus Riordan SBS Weekly, Nov 13 SBS MC 6/1

7 Field Clams and 48D48 Field clams taken from model in TOSCA Windows for beamie modified slightly to fit configurations Cuts in magnet taken from TOSCA, add in cut for cal accetance Seamus Riordan SBS Weekly, Nov 13 SBS MC 7/1

8 Field Clams Interference Q = 5 GeV Q = 1 GeV Clams may interfere with e ath in G Seamus Riordan SBS Weekly, Nov 13 SBS MC 8/1

9 G Calorimeter Backgrounds Ran single electrons through full setu Recorded hits in calorimeters, but ignore showering From single events, integration over ADC gate given by: Ē = N e µ = N e µ + σ Seamus Riordan SBS Weekly, Nov 13 SBS MC 9/1

10 G Calorimeter Backgrounds, Q = 5 GeV G 5 GeV nergy Distribution - Cal 6 1 mean =.6 GeV rms =.13 GeV 75 µa, 1 ns, Fluct/Mean =.55e nergy [GeV] Seamus Riordan SBS Weekly, Nov 13 SBS MC 1/1

11 G Calorimeter Backgrounds, Q = 5 GeV G 5 GeV nergy Distribution - HCal mean =.13 GeV rms =.57 GeV 75 µa, 1 ns, Fluct/Mean =.19e nergy [GeV] Seamus Riordan SBS Weekly, Nov 13 SBS MC 11/1

12 G Calorimeter Backgrounds, Q = 5 GeV G 5 GeV nergy Distribution Horizontal - Cal G 5 GeV nergy Distribution Vertical - Cal nergy Flux [GeV/cm] nergy Flux [GeV/cm] osition [cm] osition [cm] G 5 GeV nergy Distribution Horizontal - HCal 5 G 5 GeV nergy Distribution Vertical - HCal 1 4 nergy Flux [GeV/cm] nergy Flux [GeV/cm] osition [cm] osition [cm] Seamus Riordan SBS Weekly, Nov 13 SBS MC 1/1

13 G Calorimeter Backgrounds, Q = 1 GeV G 1 GeV nergy Distribution - Cal mean =.16 GeV rms =.14 GeV 75 µa, 1 ns, Fluct/Mean = 3.6e nergy [GeV] Seamus Riordan SBS Weekly, Nov 13 SBS MC 13/1

14 G Calorimeter Backgrounds, Q = 1 GeV G 1 GeV nergy Distribution - HCal mean =.33 GeV rms =.187 GeV 75 µa, 1 ns, Fluct/Mean =.89e nergy [GeV] Seamus Riordan SBS Weekly, Nov 13 SBS MC 14/1

15 G Calorimeter Backgrounds, Q = 1 GeV G 1 GeV nergy Distribution Horizontal - Cal G 1 GeV nergy Distribution Vertical - Cal nergy Flux [GeV/cm] 3 nergy Flux [GeV/cm] osition [cm] osition [cm] G 1 GeV nergy Distribution Horizontal - HCal G 1 GeV nergy Distribution Vertical - HCal nergy Flux [GeV/cm] nergy Flux [GeV/cm] osition [cm] osition [cm] Seamus Riordan SBS Weekly, Nov 13 SBS MC 15/1

16 G Calorimeter Backgrounds, Q = 1 GeV x [cm] 15 Cal Background Origin, G, Q = 8 GeV z [cm] Seamus Riordan SBS Weekly, Nov 13 SBS MC 16/1

17 G Calorimeter Backgrounds, Q = 1 GeV x [cm] 15 HCal Background Origin, G, Q = 8 GeV z [cm] Seamus Riordan SBS Weekly, Nov 13 SBS MC 17/1

18 G GM Rates, Q = 5 GeV First GM in each stack: G 5GeV Hit Rate Distribution - GM 1 G 5GeV Hit Rate Distribution - GM ] Rate [khz/cm ] Rate [khz/cm Horizontal Position [cm] Horizontal Position [cm] 16 G 5GeV Hit Rate Distribution - GM ] Rate [khz/cm Horizontal Position [cm] Seamus Riordan SBS Weekly, Nov 13 SBS MC 18/1

19 G GM Rates, Q = 8 GeV First GM in each stack: 18 G 8GeV Hit Rate Distribution - GM 1 G 8GeV Hit Rate Distribution - GM ] Rate [khz/cm 1 8 ] Rate [khz/cm Horizontal Position [cm] Horizontal Position [cm] 14 G 8GeV Hit Rate Distribution - GM ] Rate [khz/cm Horizontal Position [cm] Seamus Riordan SBS Weekly, Nov 13 SBS MC 19/1

20 G GM Rates, Q = 1 GeV First GM in each stack: G 1 GeV Hit Rate Distribution - GM 1 G 1 GeV Hit Rate Distribution - GM ] Rate [khz/cm ] Rate [khz/cm Horizontal Position [cm] Horizontal Position [cm] G 1 GeV Hit Rate Distribution - GM 11 5 ] Rate [khz/cm Horizontal Position [cm] Seamus Riordan SBS Weekly, Nov 13 SBS MC /1

21 Work To Do Continue to iterate geometries, analysis Shielding Clams/48D48 Beamline/target chamber GM construction Look at accetances with new configuration nsure no overlaing geometries Maintain/imrove codebase Imort remoll-style IO, generators Pre-vertex radiative effects and multile scattering missing Adat so has outut trees comatible with SBS GM resonse code? Seamus Riordan SBS Weekly, Nov 13 SBS MC 1/1

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