Search found 17 matches

by AnomalySmith
10 Mar 2016, 03:42
Forum: Introductions >> Start Here !
Topic: Gerhard Bast
Replies: 1
Views: 1556

Re: Gerhard Bast

Hi Bast, Welcome on the forum, it's always a pleasure to have one more gamma-hobbist. Steven has indeed pretty nice products and advices ;) I'd be very interested if a HPGe would be released for less than the current market costs as well, but these pieces are out of hobbyist budget. Hope to see you ...
by AnomalySmith
05 Mar 2016, 19:52
Forum: Detectors
Topic: LaBr3 and PMT
Replies: 4
Views: 3197

Re: LaBr3 and PMT

Hi Luuk and Tom, I indeed planned to use this recommendation about the pmt size since I read the possibibility that the photocathode wouldn't be homogenous. So SBA PMT is definitely enough for these crystals. Anyway, I planned to make this scintillator full homemade with detailed building steps (cho...
by AnomalySmith
02 Mar 2016, 19:59
Forum: Detectors
Topic: LaBr3 and PMT
Replies: 4
Views: 3197

LaBr3 and PMT

Hi everyone, I'm planning to build a LaBr3:Ce probe this year and would like to have your opinion. LaBr3 having a really good resolution.. and being expensive, I will naturally privilege SBA or UBA PMT. I saw that there is a Q.E difference near 8% between these (see attachment) but SBA are often men...
by AnomalySmith
06 Jan 2016, 21:30
Forum: Introductions >> Start Here !
Topic: I am Tom Fisher a Newbie from Ketchikan Alaska
Replies: 6
Views: 3426

Re: I am Tom Fisher a Newbie from Ketchikan Alaska

Hi, I guess it depends on the purpose you want to use it. Is it for low or high activity measurement, spectroscopy or only for counting? Have you see the condition of your crystal? If it was nicely sealed and no leaks occured, there may not be any problem. Otherwise it could be a problem, NaITl ones...
by AnomalySmith
03 Jan 2016, 22:45
Forum: Introductions >> Start Here !
Topic: I am Tom Fisher a Newbie from Ketchikan Alaska
Replies: 6
Views: 3426

Re: I am Tom Fisher a Newbie from Ketchikan Alaska

Hi Tom,

Welcome to the group!

If you want to build your own scintillator or modify it, I guess and hope my previous post may bring you some enlightenments: viewtopic.php?f=14&t=108

Feel free to post your questions on the forum!

Yvan.
by AnomalySmith
03 Jan 2016, 22:26
Forum: Detectors
Topic: Making a scintillator
Replies: 22
Views: 12325

Re: Making a scintillator

Hi folks, I give you some news about this project. I have lastly decided to improve the shielding of the entire enclosure which helped greatly against interferences. I'm actually obliged to set the sensibility especially for this scintillator on my Ludlum bit it's fine. The next time, and for those ...
by AnomalySmith
20 Dec 2015, 04:45
Forum: Detectors
Topic: Making a scintillator
Replies: 22
Views: 12325

Re: Making a scintillator

Hi, Finally able to (almost) finish the plastic scintillator. For the final version, I used SMD package type resistor which helped me to conceive a low-profil circuit, especially for voltage divider. I changed the 10MOhm base value with 5.1MOhm following the datasheet's ratio like so: K-Dy1: 10MOhm ...
by AnomalySmith
15 Dec 2015, 04:15
Forum: Introductions >> Start Here !
Topic: Tim from New South Wales
Replies: 3
Views: 2125

Re: Tim from New South Wales

Hi Tim and welcome! I'm also interested in monitoring the radiation on large areas and began to build a geiger network composed of geiger module and embedded server in France to build an OpenData knowledge base, that's the main purpose of my just-birth association. Also, have you already heard about...
by AnomalySmith
26 Nov 2015, 04:47
Forum: Detectors
Topic: Making a scintillator
Replies: 22
Views: 12325

Re: Making a scintillator

Hi sesselmann and valentin, There is no need to replace the 3kV caps with smaller ones unless you are trying to save space. Yes because I'm trying to make a low-profil electronic module. @valentin: Indeed, I allowed myself to use PVC (5mm thick) pipe, black painted because I actually own a Mu-metal ...
by AnomalySmith
22 Nov 2015, 22:04
Forum: Detectors
Topic: Making a scintillator
Replies: 22
Views: 12325

Re: Making a scintillator

Hi, I finally took off the crystals from the PMT, good new: the pusle rate is now about 2/min max. Its also respond correctly with a UV LED carefully pointed thought the different layers of tissu used to cover the whole (~350 000 cpm). I guess the next step will be to wait the BC-412 crystal and fin...