CATRiNA: Difference between revisions
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[[File:CATRiNA at Gamma Station beamline.png|600px|thumb|right|CATRiNA at Gamma Station beamline]] | [[File:CATRiNA at Gamma Station beamline.png|600px|thumb|right|CATRiNA at Gamma Station beamline]] | ||
= Introduction = | = Introduction = | ||
The '''C'''ompound '''A'''rray for '''T'''ransfer '''R'''eactions '''i'''n '''N'''uclear '''A'''strophysics (CATRiNA) <ref name="Perello2019">J. F. Perello et al. NIMA '''930''', 196 (2019) https://doi.org/10.1016/j.nima.2019.03.084 </ref> is neutron detector array located at Florida State University. CATRiNA is composed of 32 deuterated-benzene (<math> | The '''C'''ompound '''A'''rray for '''T'''ransfer '''R'''eactions '''i'''n '''N'''uclear '''A'''strophysics (CATRiNA) <ref name="Perello2019">J. F. Perello et al. NIMA '''930''', 196 (2019) https://doi.org/10.1016/j.nima.2019.03.084 </ref> is a neutron detector array located at Florida State University. CATRiNA is composed of 32 deuterated-benzene (<math> \textrm{C}_6 \textrm{D}_6 </math>) liquid scintillators. The array consists of 16 "small" detectors which has 2" x 2" aluminum cell each and 16 "large" detectors that has a 4" x 2" aluminum cell each. Due to the anisotropic light-output spectrum of of neutron-deuterium scattering, the light-output can be converted to the neutron energy without time-of-flight information in a process known as spectrum unfolding <ref name="Morelock2022">A. B. Morelock et al. NIMA '''1034''', 166759 (2022) https://doi.org/10.1016/j.nima.2022.166759 </ref>. Please refer [[https://fsunuc.physics.fsu.edu/wiki/index.php/Python_Iseg_HV_controller | here]] for setting up the HV source for CATRiNA. | ||
= Light-Output Response = | |||
From page 570-571 of Radiation Detection and Measurement by Knoll, the recoil neutron energy is given as a function of the target recoil angle in the lab frame <math> \theta </math>, incident neutron energy <math> E_n </math>, and nucleon number of target nucleus <math> A </math> | |||
<math> E_{recoil} = \frac{4A}{(1+A)^2}cos^2\theta E_n </math> | |||
For maximum energy transfer, <math> \theta = 0 </math>, and | |||
<math> E_{recoil} = \frac{4A}{(1+A)^2} E_n </math> | |||
For deuterium, <math> A = 2 </math> which implies a maximum deposited neutron energy of <math> E_{recoil}/E_n = \frac{8}{9} </math>. | |||
From previous work, the light-output response of a given CATRiNA detector can be parameterized as a function of incident neutron energy and experimentally-extracted parameters: | |||
<math> LO = aE_{dep}-b(1-e^{-cE_{dep}}) </math> | |||
The light output parameters are given by the following table <ref name="Morelock2022">A. B. Morelock et al. NIMA '''1034''', 166759 (2022) https://doi.org/10.1016/j.nima.2022.166759 </ref> | |||
{|class='wikitable' | |||
! Size !! a !! b !! c | |||
|- | |||
|2" x 2" || 0.6193 || 2.036 || 0.2592 | |||
|- | |||
|4" x 2" || 0.6109 || 1.946 || 0.2625 | |||
|} | |||
= Digitizer setup for coincident with RF = | |||
[[File:CATRiNA Cable connection.png|500px|thumb|right|CATRiNA cable connection]] | |||
Digitizer 1 is the master, and received the RF-coin signal. | |||
Digitizer 2 and 3 are the slaves, connected to the neutron detectors | |||
The TRG-OUT of digi-2 and -3 will be "on" when ever any channel is fired. To do so, the Local Shaped Trigs [G] must be OR. | |||
[[File:Local shaped trigger setting for CATRiNA.png|500px]] | |||
also, the TRG-OUT Mode is Trigger (Mask) and the TRG-OUT Mask buttons are green for all channels. | |||
[[File:CATRiNA TRG-OUT setting.png|700px]] | |||
=== Time sync === | |||
Digitizer 1 is SW controll and internal clock. The TRG-OUT mode is "RUN". | |||
Digitizer 2 and 3 are S-IN and external clock. | |||
= Contact = | = Contact = | ||
Latest revision as of 21:13, 15 March 2026
Introduction
The Compound Array for Transfer Reactions in Nuclear Astrophysics (CATRiNA) [1] is a neutron detector array located at Florida State University. CATRiNA is composed of 32 deuterated-benzene () liquid scintillators. The array consists of 16 "small" detectors which has 2" x 2" aluminum cell each and 16 "large" detectors that has a 4" x 2" aluminum cell each. Due to the anisotropic light-output spectrum of of neutron-deuterium scattering, the light-output can be converted to the neutron energy without time-of-flight information in a process known as spectrum unfolding [2]. Please refer [| here] for setting up the HV source for CATRiNA.
Light-Output Response
From page 570-571 of Radiation Detection and Measurement by Knoll, the recoil neutron energy is given as a function of the target recoil angle in the lab frame , incident neutron energy , and nucleon number of target nucleus
For maximum energy transfer, , and
For deuterium, which implies a maximum deposited neutron energy of .
From previous work, the light-output response of a given CATRiNA detector can be parameterized as a function of incident neutron energy and experimentally-extracted parameters:
The light output parameters are given by the following table [2]
| Size | a | b | c |
|---|---|---|---|
| 2" x 2" | 0.6193 | 2.036 | 0.2592 |
| 4" x 2" | 0.6109 | 1.946 | 0.2625 |
Digitizer setup for coincident with RF
Digitizer 1 is the master, and received the RF-coin signal. Digitizer 2 and 3 are the slaves, connected to the neutron detectors
The TRG-OUT of digi-2 and -3 will be "on" when ever any channel is fired. To do so, the Local Shaped Trigs [G] must be OR.
also, the TRG-OUT Mode is Trigger (Mask) and the TRG-OUT Mask buttons are green for all channels.
Time sync
Digitizer 1 is SW controll and internal clock. The TRG-OUT mode is "RUN".
Digitizer 2 and 3 are S-IN and external clock.
Contact
Sergio Almaraz-Calderon mailto:salmarazcalderon@fsu.edu
References
- ↑ J. F. Perello et al. NIMA 930, 196 (2019) https://doi.org/10.1016/j.nima.2019.03.084
- ↑ 2.0 2.1 A. B. Morelock et al. NIMA 1034, 166759 (2022) https://doi.org/10.1016/j.nima.2022.166759