PHYSICAL CHAMBER CUTAWAY (AXIAL / RADIAL VIEW)
Dr. H. J. Bhabha
Chairman AEC • Trombay
ANODE (+) $r=a$ (Wire)
CATHODE (−) $r=b$ (Metal Wall)
[ MICA WINDOW: 1.5 mg/cm² ]
Electron ($e^-$)
Argon Ion ($Ar^+$)
Quench Mol ($Q^+$)
UV Photon ($\gamma_{uv}$)
Beta ($\beta^-$)
Alpha ($\alpha$)
Gamma ($\gamma$)
Electric Field: $E(r) = \frac{V}{r \ln(b/a)}$
D.A.E. / T.I.F.R. INSTRUMENTATION LOG • FORM CR-62
REG: #TIFR-62-0849-B
TUBE ASSEMBLY: Coaxial G-M Counter Type 62-B (900V Plateau)
GAS MEDIUM: 90% Ar + 10% Br₂ Halogen Quench • Window: 1.5 mg/cm² Mica
Tested:
(H. J. Bhabha)
Payload:
(V. A. Sarabhai)
DEPT. OF ATOMIC ENERGY
★ TROMBAY ★
12 OCT 1962
CERTIFIED
Dr. V. A. Sarabhai
PRL • Thumba Project
TEKTRONIX DIGITAL STORAGE OSCILLOSCOPE
CH1: 2.0 V/div
TB: 20 $\mu\text{s}$/div
LIVE TRACE:
Newer ◀──────── Older (t)
Discriminator $V_{th} = 0.5\,\text{V}$
PULSE HEIGHT
0.00 V
DEAD TIME ($\tau_d$)
68.5 μs
RC CONSTANT
100.0 μs
AVALANCHE GAIN
$3.4 \times 10^9$
TOTAL COUNTS ($N$)
000000
$\sigma_N = \sqrt{N} = \pm 0$
OBSERVED RATE ($m$)
0.0 CPS
0 CPM
TRUE RATE ($n$)
0.0 CPS
Loss: 0.0%
Dead Time Law: $n = \frac{m}{1 - m\tau}$
Abs. Efficiency: 18.4%