1 / 8

Status of SPD simulation

This presentation by Bjørn S. Nilsen at ALICE Offline Week outlines comparisons with test beams, model comments, and new preliminary results. The work is ongoing, discussing the simulator models and the changes made to ALICE software. The presentation covers track paths, physical processes, generator updates, and the double peak in SPD Mips. The need for simulating test beam data and comparing with previous results is highlighted. The focus is on geometrical charge sharing, charge diffusion, and noise analysis in pixel simulations.

cpearson
Download Presentation

Status of SPD simulation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Status of SPD simulation By Bjørn S. Nilsen The Ohio State University Presented at The ALICE Offline Week, Bjørn S. Nilsen

  2. Outline • Earlier Comparisons to Test beams. • Some Comments on the Models. • Preliminarynew results • Work still on going. Presented at The ALICE Offline Week, Bjørn S. Nilsen

  3. Earlier Comparisons ALICE-INT-2001-48 Bari-Salerno Dubna Test Beam Presented at The ALICE Offline Week, Bjørn S. Nilsen

  4. Basically a port of the NA57 pixel simulator. Geometrical Charge Sharing. Capacitive, or other, Coupling between neighboring pixels, turned off. Basically a port from the old FORTRAN GALICE SPD simulator. Geometrical Charge Sharing and Charge Diffusion. The Models Bari-Salerno Dubna Presented at The ALICE Offline Week, Bjørn S. Nilsen

  5.   Continue • Track path, x=-12.5+25*t, y=-150+300*t, z=-200+400*t where 0.0t1.0; d(t)=300*t. • N(r,t)=1/(4Dd(t)/v)3/2 exp{-(r-r0)2/4Dd(t)/v} • D=KT/e, v= |E| 4Dd(t)/v =4KTd(t)/e|E|. Delta Function Presented at The ALICE Offline Week, Bjørn S. Nilsen

  6. Original Comparison All Physical processes on including –rays. Maximum continuous energy loss 75KeV. Maximum step, Through Chip. ParticleGun? Present work All Physical processes on including –rays. Maximum continuous energy loss 35KeV. Maximum step, 75m. ParticleBox Relevant Changes To AliRoot Presented at The ALICE Offline Week, Bjørn S. Nilsen

  7. Present ResultsPreliminary-Work Not Finished • Generator, ParticleBox, allows ’s to cover all locations within a pixel. • Generator, ParticleGun, ’s hit the same place on the same pixel every time. • New Test beam data has been taken and needs simulation. Linear Scales ~51% for 1 ~46% for 2 ~96% for 1 ~ 5% for 2 For test-beam we have ~49% for 1 and ~49% for 2 (z: ~95% and 6.5%). We need to make a simulation with the exact same condition as there were in the test-beam. Also need to compare with new test-beam and NA57. Presented at The ALICE Offline Week, Bjørn S. Nilsen

  8. Double Peak in SPD Mips Peak Number of Pixels with a given signal size Threshold 2000. Signal size, electrons 200m Thick Si Noise 200. Presented at The ALICE Offline Week, Bjørn S. Nilsen

More Related