Search found 693 matches

by Steven Sesselmann
26 Nov 2019, 13:28
Forum: General discussion
Topic: Mini Xray xrf
Replies: 14
Views: 184

Re: Mini Xray xrf

Taray, I fond some information here; https://www.arpansa.gov.au/understanding-radiation/what-is-radiation/ionising-radiation/x-ray It seems consistent with Ciro's comment above, the main bremsstrahlung peak is around 1/3 of maximum, where the maximum energy is the input voltage times charge. Steven
by Steven Sesselmann
25 Nov 2019, 16:41
Forum: General discussion
Topic: Mini Xray xrf
Replies: 14
Views: 184

Re: Mini Xray xrf

Taray, If your tube outputs 15 keV x-rays and we assume a high Z target then your power supply is probably only giving you 15kV under load. I am also keen to explore XRF using a scintillation detector, but I'm thinking of buying an LaBr3 or CeBr3 crystal, these crystals are normally very expensive, ...
by Steven Sesselmann
25 Nov 2019, 16:41
Forum: General discussion
Topic: Mini Xray xrf
Replies: 14
Views: 184

Re: Mini Xray xrf

Taray, If your tube outputs 15 keV x-rays and we assume a high Z target then your power supply is probably only giving you 15kV under load. I am also keen to explore XRF using a scintillation detector, but I'm thinking of buying an LaBr or CeBr crystal, These crystals are normally very expensive, bu...
by Steven Sesselmann
22 Nov 2019, 09:24
Forum: Introductions >> Start Here !
Topic: One more aboard!
Replies: 1
Views: 37

Re: One more aboard!

Hello Sibir,

Welcome to the forum, good to hear that google finds us..

You are absolutely right, there is something about the nucleus of an atom that lies at the heart of physics, the amazing property that allows matter to convert into space via a gamma ray is the root of time itself.

Steven
by Steven Sesselmann
20 Nov 2019, 11:52
Forum: Detector drivers
Topic: Scintillix gamma spectrometer
Replies: 5
Views: 139

Re: Scintillix gamma spectrometer

Milos,

Thanks for sharing. Nice professional looking unit and a good looking spectrum.

Well done..

Steven
by Steven Sesselmann
20 Nov 2019, 11:46
Forum: Detector drivers
Topic: GS-Gamma-Recorder
Replies: 3
Views: 328

Re: GS-Gamma-Recorder

Conor, Yes you are quite right, the processor on the Pi4 runs quite hot, so I added copper heatsinks on the processor and the two other chips, and yes the peak current draw can reach 2.5-3A but the way I configured the recorder, it was running without screen, mouse and keyboard, so even with the GS-...
by Steven Sesselmann
15 Nov 2019, 09:45
Forum: Introductions >> Start Here !
Topic: Hello
Replies: 2
Views: 89

Re: Hello

Hi Can,

Thanks for the intro...

Please go to the user control panel (UCP) and add your name, location and any other info you want to share in the signature section, this will appear under every post you make. It helps members identify who is posting.

Thanks.
by Steven Sesselmann
15 Nov 2019, 09:19
Forum: Detector drivers
Topic: Charge Sensitive Preamplifier for CZT
Replies: 1
Views: 84

Re: Charge Sensitive Preamplifier for CZT

Can, There are a lot of designs for preamplifiers out there and everyone claims to have the better one, my approach is to keep it as simple as possible with as few parts as possible. The CZT circuit, is it your design or was the detector prewired with the 2.2pF and 12G resistor? Your preamplifier lo...
by Steven Sesselmann
15 Nov 2019, 08:23
Forum: Detector drivers
Topic: Charge Sensitive Preamplifier for CZT
Replies: 1
Views: 84

Re: Charge Sensitive Preamplifier for CZT

Hello lovequantum,

Thanks for telling us about your cool project, but could you please start in the introductions forum, read the rules and give yourself a brief intro.

Seems like the img tags are not working, better to attach images directly.

Steven
by Steven Sesselmann
11 Nov 2019, 11:54
Forum: Detector drivers
Topic: GS-Gamma-Recorder
Replies: 3
Views: 328

GS-Gamma-Recorder

I made this device for a client who wants to conduct areal gamma surveys by drone. GSGR(3).jpg It's essentially just a Raspberry-Pi-4 with a Python script that records a .wav sound file, but as these things go, the basic idea is simple, but final execution always ends up taking more time than expect...