Help wiring a crismatec 1.25" NaI (Ti) scintillator.

Discussions about radiation-related science
Post Reply
James Luck
Posts: 29
Joined: 10 Oct 2019, 04:16
Contact:

Help wiring a crismatec 1.25" NaI (Ti) scintillator.

Post by James Luck » 08 Feb 2020, 16:44

I've recently became the owner of a Crismatec 1.25" well type scintillator. This is possibly a Bicron or Saint Gobain scintillator also. the scintillator has a wire toggle and circuit board attached with what appears to be a 12 volt wire, a shielded Gnd and respective signal out, and a high voltage.

The detectors information is as follows,
Type: 32 SPE 50
Serial: NaI (Ti) A 573
crismatec 77140 NEMOURS FRANCE.

i have been unsuccessful on finding any data on this, if anyone has any ideas on wiring and operation it would be appreciated. I'm hopping i could get away from the data connector, and use a two connector system, if not i guess i could make a adapter to my computer.
-James
James luck
Chicago Ill, USA.
Hobbyist, primary meter: refurbished Eberline Esp-1.
Probe: 3 inch plastic scintillator kit from iradinc.

luuk
Posts: 246
Joined: 01 May 2015, 21:00
Location: the Netherlands
Contact:

Re: Help wiring a crismatec 1.25" NaI (Ti) scintillator.

Post by luuk » 08 Feb 2020, 19:21

Hi James,
I saw it on eBay ,it is probably a custom made model so it will be very difficult to get data/info about it.
Best is to open the back and try to see if you can get directly to the pmt connector/wires.
Then it should be possible to connect it.
Some picture from the electronics might help too.
Luuk

James Luck
Posts: 29
Joined: 10 Oct 2019, 04:16
Contact:

Re: Help wiring a crismatec 1.25" NaI (Ti) scintillator.

Post by James Luck » 08 Feb 2020, 21:21

luuk wrote:
08 Feb 2020, 19:21
Hi James,
I saw it on eBay ,it is probably a custom made model so it will be very difficult to get data/info about it.
Best is to open the back and try to see if you can get directly to the pmt connector/wires.
Then it should be possible to connect it.
Some picture from the electronics might help too.
Luuk
Thank you for the reply, ill post some pictures of it to here later into the day. im on midnight scheduled so ill be getting some rest before hand.
-James
James luck
Chicago Ill, USA.
Hobbyist, primary meter: refurbished Eberline Esp-1.
Probe: 3 inch plastic scintillator kit from iradinc.

James Luck
Posts: 29
Joined: 10 Oct 2019, 04:16
Contact:

Re: Help wiring a crismatec 1.25" NaI (Ti) scintillator.

Post by James Luck » 09 Feb 2020, 10:37

https://drive.google.com/drive/folders/ ... sp=sharing

Here's a link to the photos of the Crismatec. it appears the body is pressed together, im going to continue fiddling.
James luck
Chicago Ill, USA.
Hobbyist, primary meter: refurbished Eberline Esp-1.
Probe: 3 inch plastic scintillator kit from iradinc.

User avatar
Steven Sesselmann
Posts: 760
Joined: 27 Apr 2015, 11:40
Location: Sydney
Contact:

Re: Help wiring a crismatec 1.25" NaI (Ti) scintillator.

Post by Steven Sesselmann » 09 Feb 2020, 12:45

James,

I would get rid of the circuit board and focus on identifying the four wires that come from the detector. Note the board has some letters next to these four wires but I cant quite read it.

You can assume one wire is ground and one is HV bias, so that leaves the other two to identify.

Steven

luuk
Posts: 246
Joined: 01 May 2015, 21:00
Location: the Netherlands
Contact:

Re: Help wiring a crismatec 1.25" NaI (Ti) scintillator.

Post by luuk » 09 Feb 2020, 23:09

Hi James,
Looking at your picture it looks like the thick white wire is HV (pos or neg?)
The coax center is signal the coax shield is ground, and the red wire is probably low power for the amplifier I would expect +5 or +12 Volt.
You could give it a try!
Luuk

James Luck
Posts: 29
Joined: 10 Oct 2019, 04:16
Contact:

Re: Help wiring a crismatec 1.25" NaI (Ti) scintillator.

Post by James Luck » 11 Feb 2020, 19:46

luuk wrote:
09 Feb 2020, 23:09
Hi James,
Looking at your picture it looks like the thick white wire is HV (pos or neg?)
The coax center is signal the coax shield is ground, and the red wire is probably low power for the amplifier I would expect +5 or +12 Volt.
You could give it a try!
Luuk
Hey thanks Luuk, yes the coaxial cable is signal, with respective ground, its high voltage is positive, and the red says 12 volts in.
on other news i found a Bicron number to try to look into. with the finding of this number came the finding of another listing from someone else of the same detector with wire harness and circuit. the persons listing says tested good for operability, which makes me think i could possibly ask them the running voltage if known. As that is my biggest hurdle to pass. i expect something around 1 kv to 1.5 kv.

The Bicron number is ( 1.26 WM 1 .968/1.12L-XX ) I'm not vary profound at Bicrons serial number to data. so it'll be sometime to decipher.

-James

On a side note Luuk isn't your name pronounced in English as Luke? I can remember my last name in German as Luke, being its luck.
James luck
Chicago Ill, USA.
Hobbyist, primary meter: refurbished Eberline Esp-1.
Probe: 3 inch plastic scintillator kit from iradinc.

James Luck
Posts: 29
Joined: 10 Oct 2019, 04:16
Contact:

Re: Help wiring a crismatec 1.25" NaI (Ti) scintillator.

Post by James Luck » 11 Feb 2020, 20:10

Here's some links to similar listings for essentially the same probe i picked up, i think it was surplus from many companies or government departments, but without the running equipment. probably scrapped.
https://www.ebay.com/itm/Bicron-Gamma-S ... SwoUZbvSOb

https://www.ebay.com/itm/Chrismatec-Bic ... 0438!US!-1

So i'm likely not the only one trying to figure these out, im also guessing that the data sheets are lost to time, prob when everyone merged under Saint-Gobain.
If everything eventually works out ill likely buy another its a nice small detector, rugged in build, with a sizable well for sampling ( something i've wanted to do)
James luck
Chicago Ill, USA.
Hobbyist, primary meter: refurbished Eberline Esp-1.
Probe: 3 inch plastic scintillator kit from iradinc.

Addison.G
Posts: 6
Joined: 13 May 2019, 04:01
Contact:

Re: Help wiring a crismatec 1.25" NaI (Ti) scintillator.

Post by Addison.G » 07 Apr 2020, 13:04

Hi James,
Did you ever get that detector working? I recently acquired a similar one with slightly different labeling but still a 32 SPE 50. On the label it lists the PMT as a hamamatsu R268. I'm probably going to try powering it up with the signal out to an oscilloscope and slowly ramp the voltage up to see what I get.

James Luck
Posts: 29
Joined: 10 Oct 2019, 04:16
Contact:

Re: Help wiring a crismatec 1.25" NaI (Ti) scintillator.

Post by James Luck » 13 Jun 2020, 11:51

Addison.G wrote:
07 Apr 2020, 13:04
Hi James,
Did you ever get that detector working? I recently acquired a similar one with slightly different labeling but still a 32 SPE 50. On the label it lists the PMT as a hamamatsu R268. I'm probably going to try powering it up with the signal out to an oscilloscope and slowly ramp the voltage up to see what I get.
Hello Addison,
I havent found the time to try and power the probe. Work has took most of my free time, starting shortly after I asked for help on here. Plus the lack of time between moving houses.

Have you tried to power the probe yet? I was unable to find vary much information on the thing when I purchased the thing. Even tried going to Bicron I think it was, since them and Crismatec merged. So I was shooting in the dark on what type of PMT It may have within. Not only that but the strange mine came with a circut board, that has a definite singal, voltage, ground, plus one other. Including from the actual probe to circuit it had four wires so I was quite unconcerned about what I had.
James luck
Chicago Ill, USA.
Hobbyist, primary meter: refurbished Eberline Esp-1.
Probe: 3 inch plastic scintillator kit from iradinc.

Post Reply

Who is online

Users browsing this forum: No registered users and 0 guests