SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant...
Transcript of SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant...
![Page 1: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/1.jpg)
SP08: Constant Fraction Discriminator
Jeremy SmithJeter Hall
David KiedaVladimir Vassiliev
![Page 2: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/2.jpg)
August 36, 2001 Leeds
Timeline
Simulations completed April 15, 2001CFD board lay out completed May 25, 2001PDR approval June 6, 2001CFD boards manufactured July 10, 2001CFD boards stuffed July 15, 2001Test board prototype completed July 30, 2001Testing begun July 31, 2001
![Page 3: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/3.jpg)
August 36, 2001 Leeds
Night Sky Background
m=7.4 is 0.2 pe/nsm=6.6 is 0.4 pe/nsm=5.9 is 0.8 pe/nsm=5.1 is 1.6 pe/nsm=4.4 is 3.2 pe/ns
Stephane’s LeBohec calibration:m=0.0 is 180 pe/ns
![Page 4: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/4.jpg)
August 36, 2001 Leeds
Peak trigger rate
VERITASoperation
region
![Page 5: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/5.jpg)
August 36, 2001 Leeds
CFD in fADC channel
by Jim Buckley, WBS SP7
0U(t)peN32
)�U(tpeN)32
(1 =⋅⋅+−⋅⋅+−
0U(t)32
)�U(t)32
(1 =⋅+−⋅+−
U(t)�peN(t)�dcUU(t)peN32
)�U(tpeN)32
(1 ⋅++=⋅⋅+−⋅⋅+− noise
Theory Practice
U(t)�peN1
peN
(t)�
peNdcU
U(t)32
)�U(t)32
(1 ⋅++=⋅+−⋅+− noise
![Page 6: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/6.jpg)
August 36, 2001 Leeds
CF discriminator time walk
![Page 7: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/7.jpg)
August 36, 2001 Leeds
CF discriminator time dispersion
![Page 8: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/8.jpg)
August 36, 2001 Leeds
CFD Functional SchematicZero crossing comparator
1.5 ns delay
CFD rate feedback
f2VVariable gain
Time walkoptimization
PMTsignal
Discriminatorthresholdadjustment
Programmable width
Coincidence resolving timeadjustment
fraction
Thresholddiscriminator
D
CLK
Q
R
![Page 9: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/9.jpg)
August 36, 2001 Leeds
CFD board schematic
![Page 10: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/10.jpg)
August 36, 2001 Leeds
Frequency to voltage feedback
![Page 11: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/11.jpg)
August 36, 2001 Leeds
CFD board
![Page 12: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/12.jpg)
August 36, 2001 Leeds
CFDs
![Page 13: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/13.jpg)
August 36, 2001 Leeds
CFD & fADC
![Page 14: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/14.jpg)
August 36, 2001 Leeds
CFD & fADC
![Page 15: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/15.jpg)
August 36, 2001 Leeds
CFD Test Board Prototype
![Page 16: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/16.jpg)
August 36, 2001 Leeds
CFD & ADR2100
![Page 17: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/17.jpg)
August 36, 2001 Leeds
Pulse
![Page 18: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/18.jpg)
August 36, 2001 Leeds
Team
![Page 19: SP08: Constant Fraction Discriminatorveritas/docs/sub_proj8/cfd_update.pdf · SP08: Constant Fraction Discriminator Jeremy Smith Jeter Hall David Kieda Vladimir Vassiliev. August](https://reader033.fdocuments.net/reader033/viewer/2022041905/5e63243cdce5e70bb8379428/html5/thumbnails/19.jpg)
August 36, 2001 Leeds
Status
Testing …