US 12,247,937 B2
Optical fiber-based gamma calorimeter (OFBGC)
Thomas E. Blue, Columbus, OH (US); Anthony Birri, Columbus, OH (US); and Christian M. Petrie, Knoxville, TN (US)
Assigned to Ohio State Innovation Foundation, Columbus, OH (US); and UT-Battelle, LLC, Oak Ridge, TN (US)
Filed by Ohio State Innovation Foundation, Columbus, OH (US); and UT-Battelle, LLC, Oak Ridge, TN (US)
Filed on Mar. 26, 2021, as Appl. No. 17/213,432.
Claims priority of provisional application 63/031,093, filed on May 28, 2020.
Prior Publication US 2021/0372957 A1, Dec. 2, 2021
Int. Cl. G01K 17/00 (2006.01); G01N 25/48 (2006.01); G01T 1/00 (2006.01); G01T 1/12 (2006.01); G21C 17/112 (2006.01)
CPC G01N 25/4813 (2013.01) [G01K 17/00 (2013.01); G01T 1/006 (2013.01); G01T 1/12 (2013.01); G21C 17/112 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An optical fiber-based gamma calorimeter (OFBGC) comprising:
a thermal mass;
an insulating tube disposed within a central region of the thermal mass;
a plurality of optical fiber sensors running through respective holes in the insulating tube, wherein the optical fiber sensors are configured to monitor a temperature of the thermal mass;
an outer sheath;
a gas backfilling between the thermal mass and the outer sheath; and
a heating wire running through two holes in the insulating tube,
wherein the heating wire has a predetermined length and linear heating rate, q′(z), and
wherein the linear heating rate q′(z), is used to derive a relationship with an axially dependent temperature difference, ΔT(z), between the plurality of optical fiber sensors to calibrate the OFBGC.