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--- russia:snm-32 [2015/11/03 03:44] – mcmaster
+++ russia:snm-32 [Unknown date] (current) – removed - external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
-http://www.fusor.eu/monitors.html#neutron_detector
-  * Has very good information
-  * Basically suggests 100M resistor with 1500V supply
-====== eBay listing ======
-<code>
-Russian Slow Neutron Corona Counter SNM-32
-Operating  Voltage - 1500V - 3000V
-Strating Voltage - 600V - 700V
-Slop of plateau, % per 100 V - ≤ 1
-Neutron sencitivity, pulses per neutron/ cm2 - 0.8
-Plateau Length - 1500 V
-Natural counter background, pulses/sec - ≤ 1
-Body Diameter - 18 mm
-Body Length  - 313 mm
-</code>
-Same thing as CHM32?  [[https://www.flickr.com/photos/bionerd/5623628653/in/photostream/|Maybe the datasheet]]
-  * "Sometimes references are made to this detector as the CHM-32 detector, which is identical to SNM-32, but written in Cyrillic script"
-From that page:
-. наклон плато счетной характеристики % на I в
-Plateau (voltage) slope count(ing) characteristics percent in I (current?) B (voltage?) (in maximum column) 0.01
-. чувствительность счетчика к нейтронам по отношению к контрольному образцы, относит .ед.
-sensitivity of the counter to neutrons with respect to the control sample refers (reference) . units. (minimum column) 0.8
-. Напряжение зажигания коронного разряда, в
-Corona discharge voltage (V) (min-max) 600-700
-. средний ток коронного разряда, мкА
-Average Corona Discharge Current, MicroAmps (max column) looks like 28 (23?)
-. собственный фон, имп.с ^ -I
-Own background (some unit of measure, which transliterates to imp.s to the negative I; S could be impulse seconds in this case and maybe I is still current?) anyway ... (max column) 0.017
-. радиационная помехоустойчивость, Р/ч
-Radiation Noise Immunity (Rads/hour) (max column) 1500 uh...WOW!
-. выходная емкость, пф
-Output Capacitance (pF = picofarad?) (max column) 6
-Wonder what the output impedance is?
-. сопротивление изоляции, Ом
-Insulation Resistance, Ohhs. (min column) 10 to the 10th
-Some of the earlier blurbs:
-  * tчетчикиа = partially snm32 snm42
-  * etiketka = label
-  * tчетчикиа = partially snm32 snm42, prednaznachen = intented, dlia = for, registratsii = record, miedlenih = slow, nietronov = neutron, v = in, diapasonie = diapason, energii = energy klimaticheskoi ispolnenie = climatic execution, uksl = ?, tablitcha 1 = table 1
-  * razmer = size
-  * massa = weight
-  * ne bolee = no more
-  * osnovni = main, elektricheskie = electrical, I = and, radiometritcheskie = radiometrical, parametric = parameter
-  * tablitcha 2 = table 2
-  * nameniovanie = name, parametra = parameter
-  * edinitcha = one (number), izmernia = measure, forma = form/shape, ne menee = no less, ne bolee = no more
-  * protiajennost = distance, plato tchetnoy = plateau ?, karakteristiki = characteristics
-  * naimenovanie = name, parametra = parameter
-  * edinitsa = unit, izmerenia = measure
-Sounds like its intended to have a moderator around it to slow down fast neutrons.
-====== JM ======
-Some notes on trouble having getting it to work
-===== mk1: voltage divider =====
-{{:mcmaster:russia:snm-32:snm-32_2015-10-31_div.png?300|}}
-===== mk2: coupling cap =====
-{{:fusor.eu:helium_detector_test_setup.jpg?300|}}
-Try to follow directions here: http://www.fusor.eu/monitors.html#neutron_detector
-{{:mcmaster:russia:snm-32:snm-32_2015-11-01_cap.png?300|}}
-Above: my actual schematic