Multianode cylindrical proportional counter for high count rates
Patent
·
OSTI ID:863986
- Madison, WI
- Oak Ridge, TN
A cylindrical, multiple-anode proportional counter is provided for counting of low-energy photons (<60 keV) at count rates of greater than 10.sup.5 counts/sec. A gas-filled proportional counter cylinder forming an outer cathode is provided with a central coaxially disposed inner cathode and a plurality of anode wires disposed in a cylindrical array in coaxial alignment with and between the inner and outer cathodes to form a virtual cylindrical anode coaxial with the inner and outer cathodes. The virtual cylindrical anode configuration improves the electron drift velocity by providing a more uniform field strength throughout the counter gas volume, thus decreasing the electron collection time following the detection of an ionizing event. This avoids pulse pile-up and coincidence losses at these high count rates. Conventional RC position encoding detection circuitry may be employed to extract the spatial information from the counter anodes.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4289967
- OSTI ID:
- 863986
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/250/313/
10
60
alignment
anode
anode wire
anode wires
anodes
array
avoids
axial alignment
cathode
cathodes
central
circuitry
coaxial
coaxial alignment
coaxially
coaxially disposed
coincidence
collection
configuration
conventional
count
count rate
count rates
counter
counting
counts
cylinder
cylindrical
cylindrical anode
cylindrical array
decreasing
detection
detection circuit
detection circuitry
disposed
drift
drift velocity
electron
employed
encoding
energy photon
energy photons
event
extract
field
field strength
following
form
forming
gas
gas volume
gas-filled
improves
information
inner
ionizing
ionizing event
kev
losses
low-energy
multianode
multiple-anode
outer
photons
pile-up
plurality
position
proportional
proportional counter
provided
providing
pulse
pulse pile-up
rates
spatial
spatial information
strength
throughout
time
time following
uniform
uniform field
velocity
virtual
volume
wires
wires disposed
10
60
alignment
anode
anode wire
anode wires
anodes
array
avoids
axial alignment
cathode
cathodes
central
circuitry
coaxial
coaxial alignment
coaxially
coaxially disposed
coincidence
collection
configuration
conventional
count
count rate
count rates
counter
counting
counts
cylinder
cylindrical
cylindrical anode
cylindrical array
decreasing
detection
detection circuit
detection circuitry
disposed
drift
drift velocity
electron
employed
encoding
energy photon
energy photons
event
extract
field
field strength
following
form
forming
gas
gas volume
gas-filled
improves
information
inner
ionizing
ionizing event
kev
losses
low-energy
multianode
multiple-anode
outer
photons
pile-up
plurality
position
proportional
proportional counter
provided
providing
pulse
pulse pile-up
rates
spatial
spatial information
strength
throughout
time
time following
uniform
uniform field
velocity
virtual
volume
wires
wires disposed