Searching \ for 'EE]: Re: Alpha particles detector with PIC logger' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/microchip/devices.htm?key=pic
Search entire site for: 'Re: Alpha particles detector with PIC logger'.

Truncated match.
PICList Thread
'EE]: Re: Alpha particles detector with PIC logger'
2002\09\14@155130 by Alan Shinn

picon face
I tried to send this earlier but I think I blew it.


I have used PIN diode photodetectors (with the lid off) as alpha
detectors. I think they were EGG 10mm sq quad detedector (just cause I
had them). Hooked them up to a transimpedence amplifier with ~ 1 megohm
feedback i think.
Of course it only works in the dark.
Mine seemd to be blind to beta and gamma radiation.



Looking forward:
Alan Shinn


Experience the
beginnings of microscopy.
Make your own replica
of one of Antony van Leeuwenhoek's microscopes.
visit    http://www.mindspring.com/~alshinn/


>=================
Date:    Thu, 12 Sep 2002 12:33:04 +0200
From:    Marco Genovesi <spam_OUTmarco.genovesiTakeThisOuTspamLIBERO.IT>
Subject: [EE]: Alpha particles detector with PIC logger

Hi all,
I'm started to find for a simple radiations detector (homebuilt) for Alpha
particles, to connect with my PIC Datalogger.
I am interested only for Alpha particle because I want trace a map of High
Radon levels in some caves of my country. For a first approach isn't
necessary a very high sensibility but the circuit must be able to sense a
relatively high level ( ~ 10 pCi/L or higher).
?=================
--

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2002\09\15@044023 by Peter L. Peres

picon face
Did anyone try a silicon solar cell, with temperature compensation ?

Peter

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics


2002\09\15@095249 by Scott Stephens

picon face
From: Peter L. Peres <.....plpKILLspamspam@spam@ACTCOM.CO.IL>
Subject: Re: EE]: Re: Alpha particles detector with PIC logger


>Did anyone try a silicon solar cell, with temperature compensation ?

I tried a silicon solar cell once, it didn't work as well as a signal
transistor with the metal case hacked off (2n2222). Power transistors like a
2N3555 didn't work either. I thought with all the area a power transistor
has it would, but it didn't work with alpha anyways.

For Radon detection, long-term integration is needed. Later it occured to me
that you don't monitor the Teflon electret charge, but perhaps you stick a
probe in and out of the bottle to take a reading so the charge doesn't leak
off the field sensor.

Scott

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics


2002\09\15@101357 by Peter L. Peres

picon face
On Sun, 15 Sep 2002, Scott Stephens wrote:

>From: Peter L. Peres <plpspamKILLspamACTCOM.CO.IL>
>Subject: Re: EE]: Re: Alpha particles detector with PIC logger
>
>
>>Did anyone try a silicon solar cell, with temperature compensation ?
>
>I tried a silicon solar cell once, it didn't work as well as a signal
>transistor with the metal case hacked off (2n2222). Power transistors like a
>2N3555 didn't work either. I thought with all the area a power transistor
>has it would, but it didn't work with alpha anyways.

Hmm strange. Maybe something in the way these junctions are doped and
passivated makes a difference. Did you try it from the back too ?

>For Radon detection, long-term integration is needed. Later it occured to me
>that you don't monitor the Teflon electret charge, but perhaps you stick a
>probe in and out of the bottle to take a reading so the charge doesn't leak
>off the field sensor.

I don't know about those, I know about adsorber bottles that are later
evaluated with a scintillation detector (spectrometer) in a lab. I think
they use a small fan and are left in place for a few days. Not sure.

Peter

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics


2002\09\15@140919 by Reginald Neale

picon face
Don't know whether it uses a PIC, but there's an interesting
package available at http://www.aw-el.com/

Reg

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics


More... (looser matching)
- Last day of these posts
- In 2002 , 2003 only
- Today
- New search...