Search found 129 matches

by iRad
04 Jul 2020, 02:04
Forum: Detectors
Topic: Is this Detector Too Big, Too Old, or Just Normal?
Replies: 13
Views: 62

Re: Is this Detector Too Big, Too Old, or Just Normal?

Mike - That is actually not that bad for a detector that was primarily designed for counting anyway, especially considering the age. I also suspect the well lining may be made of a material other than stainless steel... (perhaps copper?). Can you discern what material the well might be made of if di...
by iRad
03 Jul 2020, 12:49
Forum: Detectors
Topic: Is this Detector Too Big, Too Old, or Just Normal?
Replies: 13
Views: 62

Re: Is this Detector Too Big, Too Old, or Just Normal?

The window should be made of quartz, with the doped crystal and undoped light pipe all safely inside the can, underneath and sealed to the window (hopefully not detached). I use alcohol and plenty of tissues to clean the window surface. From the pictures, it looks a bit cloudy and yellow, but may be...
by iRad
03 Jul 2020, 10:48
Forum: Detectors
Topic: Is this Detector Too Big, Too Old, or Just Normal?
Replies: 13
Views: 62

Re: Is this Detector Too Big, Too Old, or Just Normal?

Yes, what you are seeing is normal, as the stuff can get very thick over time. Although if you are careful, and the coupling compound is still clean and pliable, you could save and reuse it, but I would recommend replacing it. You'll want to inspect that crystal, and the only way to do that is to se...
by iRad
03 Jul 2020, 08:57
Forum: Detectors
Topic: Is this Detector Too Big, Too Old, or Just Normal?
Replies: 13
Views: 62

Re: Is this Detector Too Big, Too Old, or Just Normal?

Hi Mike - Next thing to do is to take the PMT housing off of the crystal can (remove the 4 allen head machine screws). The PMT housing should lift up a little bit easy enough, but the PMT may be stuck to the window of the crystal can and might need some persuasion. If they don't come apart easy enou...
by iRad
29 May 2020, 05:42
Forum: Detectors
Topic: Info about probe
Replies: 7
Views: 426

Re: Info about probe

I figured you would know more... :)
by iRad
28 May 2020, 08:29
Forum: Detectors
Topic: Info about probe
Replies: 7
Views: 426

Re: Info about probe

Of course... The model number gave me all sorts of information about its configuration.
A user here named Luuk used to work for Harshaw, and now Scionix Holland. He may know more about the detector and its design use.
by iRad
28 May 2020, 07:22
Forum: Detectors
Topic: Info about probe
Replies: 7
Views: 426

Re: Info about probe

Nice find, an odd one for sure. It appears to be a 3" diameter NaI(Tl) crystal with WELL in center and probably a 1-1/8" PMT (maybe a Hamamatsu R6095 or similar) attached to the side of the crystal (D style coupling with a section of rounded part of the crystal flattened for PMT attachment). Of cour...
by iRad
18 May 2020, 06:02
Forum: Shielding
Topic: Tin, and Pewter, and Copper, and Iron, Oh MY!
Replies: 15
Views: 1771

Re: Tin, and Pewter, and Copper, and Iron, Oh MY!

Mike - Thanks for the link to Contenti. Their prices are very reasonable and I am adding them to my contacts for future use.
by iRad
08 May 2020, 08:11
Forum: Introductions >> Start Here !
Topic: Hello from Connecticut, USA
Replies: 3
Views: 525

Re: Hello from Connecticut, USA

Welcome Andrey - Nice Blog... I love the SG-1 Neopixel Clock! Fantastic. Have fun!!!
by iRad
08 May 2020, 08:03
Forum: Detectors
Topic: Voltage divider for Scionix 38B57
Replies: 6
Views: 683

Re: Voltage divider for Scionix 38B57

Andrey - I just sent you additional diagram for separate (decoupled) HV and signal.