TKR trigger simulation (timing study)
-
Upload
cadman-mckinney -
Category
Documents
-
view
30 -
download
2
description
Transcript of TKR trigger simulation (timing study)
![Page 1: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/1.jpg)
M. N. Mazziotta(LAT-TD-01128)
TKR trigger simulation (timing study)
Udine, January 30-31, 2003
![Page 2: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/2.jpg)
Aim of this workRequirements for the hardware design:
1. Trigger delay to latch the discriminator output
2. Trigger efficiency vs threshold and coincidence window
3. Hit capture efficiency vs delay and threshold
Applications:
1. Detector acceptance calculation
2. GRB time detection
3. ....
![Page 3: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/3.jpg)
Simulation code
GEANT 3.21: geometric description and tracking
• 4 middle trays (4 x-z layers and 4 y-z layers)
HEED: Si energy loss and e-h pairs production
• Front end electronics simulation (transfer function)
• Induced current calculation (Ramo’s Theorem)
![Page 4: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/4.jpg)
Timing studies
The threshold value has been set at a fraction of Vmip.
Volt
ag
e
time
Vth
T1 T2
TOT
![Page 5: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/5.jpg)
Trigger timingTrigger: 6-fold coincidence of the first 3 x-z and 3 y-z fired planes
Coincidence window = 1 s (one shot)
Tc (time coincidence) = the last T1 of the triggered planes
Tf (trigger falling edge) = the first T2 of the triggered planes
Time coincidence width = Tf-Tc
![Page 6: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/6.jpg)
T1
T1
T1
T2
T2
T2Tc Tf
Trigger timing
![Page 7: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/7.jpg)
Timing studies: 1 GeV muons
Strip signals:
Vth=1/4Vmip
![Page 8: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/8.jpg)
Timing studies: 1 GeV muons
Plane
signals:
OR of the strips in the
plane
![Page 9: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/9.jpg)
Timing studies: 1 GeV
Two peaks!
Plane
signals:
OR of the strips in the
plane
![Page 10: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/10.jpg)
Trigger timing: 1 GeV muons
![Page 11: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/11.jpg)
Trigger timing: 1 GeV
![Page 12: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/12.jpg)
Hit capture efficiency T2-Tc = time interval when the strip signal is over the threshold (respect to the trigger time Tc).
Td = time interval between the trigger and the hit capture time (delay)
The hit is “captured” if Td < T2-Tc
The efficiency as a function of Td is evaluated from the cumulative distribution of T2-Tc
1 GeV muons have been simulated at zenith angles 0º, 10º,20º,30º,40º and uniformly distributed in azimuth
![Page 13: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/13.jpg)
Hit capture efficiency: 1 GeVTrig to TKR
Tc
![Page 14: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/14.jpg)
Hit capture efficiency: 1 GeV =40°, =0° Trig to TKR
Tc
![Page 15: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/15.jpg)
Hit capture efficiency: 1 GeV =0°: threshold scanning
Trig to TKR
Tc
![Page 16: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/16.jpg)
Hit capture efficiency: 1 GeV =40º:threshold scanningTrig to TKR
Tc
![Page 17: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/17.jpg)
Future plansGLEAM
HIT (rin, rout, E)
DIGIT
(fired strips, ToT per layer)
GLAST DIGI
TkrTrigTiming
analysisL1T
![Page 18: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/18.jpg)
Preliminary results (2 GeV , =0°)
Plane
signals:
OR of the strips in the
plane
![Page 19: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/19.jpg)
Preliminary results (2 GeV , =0°)
![Page 20: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/20.jpg)
Preliminary results (2 GeV , =0°)
Trig to TKR
![Page 21: TKR trigger simulation (timing study)](https://reader035.fdocuments.in/reader035/viewer/2022062422/56813627550346895d9d9fd2/html5/thumbnails/21.jpg)
ConclusionsA trigger timing study has been performed on
a mini TKR tower consisting of 4 middle trays The trigger hit capture efficiency has been
also evaluated
To evaluate the trigger efficiency a simulation on the whole TKR system is needed: GLEAM era!
(people: M.N.M., M. B., F. L., F. G., N. G.)