1 / 10

Noise, SCAs, etc (III)

Noise, SCAs, etc (III). Robert Zitoun Tuesday meeting Novembeer 4, 2002 Stony Brook and LAPP. Noise distribution. Pedestal run 164363 (“official” noise gain 8 run) How much from calorimeter, preamplifiers, SCA/BLS/ADC? Take a preamp off run. SCA/BLS/ADC contribution. 165300. 164363.

prue
Download Presentation

Noise, SCAs, etc (III)

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. Noise, SCAs, etc (III) Robert ZitounTuesday meetingNovembeer 4, 2002Stony Brook and LAPP R. Zitoun, Stony Brook and LAPP Tuesday Meeting

  2. Noise distribution • Pedestal run 164363 (“official” noise gain 8 run) • How much from calorimeter, preamplifiers, SCA/BLS/ADC? • Take a preamp off run R. Zitoun, Stony Brook and LAPP Tuesday Meeting

  3. SCA/BLS/ADC contribution 165300 164363 • Pedestal run preamps off (165300) • Not the same trigger: 165300 = commisioning/cal/zero_bias 164363 = official/zero_bias • Not the same SCA cell distribution R. Zitoun, Stony Brook and LAPP Tuesday Meeting

  4. SCA/BLS/ADC contribution L1 up L1 down L2 tick • First single channel • 9240 (“typical”) ih = -2 i = 17; layer = 1 • Compute pedestal for various fixed items • Noise = L1 dispersion  updown asymmetry  L2 slope  “intrinsic” • 1.18 = ~ 1.0  0.19  0.26  0.57 R. Zitoun, Stony Brook and LAPP Tuesday Meeting

  5. L1 dispersion • Same in a L1 chip • up/down are different • similarity within a daughter card • geometric correlation? R. Zitoun, Stony Brook and LAPP Tuesday Meeting

  6. L1 dispersion (II) BLS crate # channel # in BLS board daughter card # in a BLS crate daughter card channel # up down • Dependence on the electronic location R. Zitoun, Stony Brook and LAPP Tuesday Meeting

  7. up-down asymmetry • some channels with large asymmetry. Traced to “slow” chips • several channels fixed in the past (capacitance on daughter card) • some more to do R. Zitoun, Stony Brook and LAPP Tuesday Meeting

  8. L2 slope • Slopes not that big • Dispersion around the slope can be large • Some cells may be way out of the slope • Many SCA already changed. Some more to do dispersion auroun slope distance to slope R. Zitoun, Stony Brook and LAPP Tuesday Meeting

  9. Intrinsic noise BLS crate # channel # in BLS board daughter card # in a BLS crate daughter card channel # • Double (triple bump) structure R. Zitoun, Stony Brook and LAPP Tuesday Meeting

  10. Noise in towers preamps on preamps off EM+HAD1 all R. Zitoun, Stony Brook and LAPP Tuesday Meeting

More Related