US 12,007,527 B2
Drift tube borehole muon detector system, apparatus, and method for muon radiography and tomography
Douglas William Schouten, Surrey (CA)
Assigned to Ideon Technologies Inc., Richmond (CA)
Appl. No. 16/975,499
Filed by IDEON TECHNOLOGIES INC., Richmond, CA (US)
PCT Filed Mar. 20, 2020, PCT No. PCT/CA2020/000036
§ 371(c)(1), (2) Date Aug. 25, 2020,
PCT Pub. No. WO2020/186338, PCT Pub. Date Sep. 24, 2020.
Claims priority of provisional application 62/821,448, filed on Mar. 21, 2019.
Prior Publication US 2023/0102216 A1, Mar. 30, 2023
Int. Cl. G01T 1/20 (2006.01); G01V 5/00 (2006.01); G01V 5/04 (2006.01); H01J 47/00 (2006.01)
CPC G01V 5/005 (2013.01) [G01T 1/20 (2013.01); G01V 5/04 (2013.01); H01J 47/008 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A borehole muon detector for muon radiography or geotomography, the borehole muon detector including a substantially cylindrical housing, which defines a bore, a pair of end caps, each end cap sealing an end of the cylindrical housing and a plurality of sealed drift tubes which are longitudinally disposed in the bore of the housing to form a bundle of drift tubes, wherein each sealed drift tube comprises: a centrally located anode wire disposed on a longitudinal axis; an inner surface which is coated with a cathode coating, the cathode coating divided into at least first cathode pad and a second cathode pad by a Vernier pattern; and a printed circuit board in electrical communication with the anode wire for measuring a current.