Article View: sci.electronics.design
Article #131Re: nasa-celebrates-successful-mars-landing
From: dp
Date: Tue, 07 Aug 2012 12:23
Date: Tue, 07 Aug 2012 12:23
36 lines
3316 bytes
3316 bytes
On Aug 7, 5:11 am, Jon Kirwan <j...@infinitefactors.org> wrote: > ...(Most of my work was in the > visible, near UV, and near IR -- but for very different > applications.) I still have some decent setups here and I've > designed some devices that can be made for only a few > dollars, and wavelength calibrated for $8 more, so that high > school students could actually built their own real-world > equipment that could genuinely "do science" and meet > calibration standards. No intensity calibration, though, > sadly. That costs money to do. (Unless you have a suggestion > about how to do it on the cheap?) Oh no, I could not possibly have a suggestion. My spectrometers don't seem to have an overlapping wavelength range with yours, mine are xray/gamma. I am practically clueless when it comes to those in the UV and below range, mine generally count single photons. Efficiency calibration is costly on those for gamma, too, though - the calibration source costs thousands. The rest, hm, has become much less expensive since the release of the netmca-3 (one can still spend tens of thousands on it but does not have to any longer). I would be curious what gamma spectrometry the thing is carrying on board, too (if any, but likely so). Unlikely HPGe, but then who knows, Mars is a cold place, they may have figured some practical way to cool things down to about liquid nitrogen. Dimiter ------------------------------------------------------ Dimiter Popoff Transgalactic Instruments http://www.tgi-sci.com ------------------------------------------------------ http://www.flickr.com/photos/didi_tgi/sets/72157600228621276/
Technical Details
Message-ID:
<cb387dcf-7d67-4a0e-820e-ca521cad6f4b@a9g2000vbn.googlegroups.com>Path:
arc1-ca.pugleaf.net!g9ni2545pbo.0!nntp.google.com!npeer03.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!postnews.google.com!a9g2000vbn.googlegroups.com!not-for-mailReferences:
<a895o7Fa95U1@mid.individual.net> <fhpu1899csroivpfmno057i8dsdqoonbaa@4ax.com> <d2036554-ee03-42e5-a626-568b02d7cefe@j11g2000vbc.googlegroups.com> <odt028lhg82i08frth3ksbk0o02i0huet7@4ax.com>Show Full Headers
Complete Article Headers
X-Google-Thread: 103407,7af901c0b69fae4
X-Google-NewGroupId: yes
X-Google-Attributes: gida5a6238865,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII
Received: by 10.66.85.231 with SMTP id k7mr2015977paz.38.1344342232478;
Tue, 07 Aug 2012 05:23:52 -0700 (PDT)
Path: arc1-ca.pugleaf.net!g9ni2545pbo.0!nntp.google.com!npeer03.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!postnews.google.com!a9g2000vbn.googlegroups.com!not-for-mail
From: dp <dp@tgi-sci.com>
Newsgroups: sci.electronics.design,aus.electronics,comp.arch.embedded
Subject: Re: nasa-celebrates-successful-mars-landing
Date: Tue, 7 Aug 2012 05:23:52 -0700 (PDT)
Organization: http://groups.google.com
Lines: 39
Message-ID: <cb387dcf-7d67-4a0e-820e-ca521cad6f4b@a9g2000vbn.googlegroups.com>
References: <a895o7Fa95U1@mid.individual.net> <fhpu1899csroivpfmno057i8dsdqoonbaa@4ax.com>
<d2036554-ee03-42e5-a626-568b02d7cefe@j11g2000vbc.googlegroups.com> <odt028lhg82i08frth3ksbk0o02i0huet7@4ax.com>
NNTP-Posting-Host: 130.204.228.174
Mime-Version: 1.0
X-Trace: posting.google.com 1344342232 4272 127.0.0.1 (7 Aug 2012 12:23:52 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Tue, 7 Aug 2012 12:23:52 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: a9g2000vbn.googlegroups.com; posting-host=130.204.228.174; posting-account=i5g-bQoAAADNBBSpwylQJRlavAUF_RhF
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/5.0 (Windows NT 5.1; rv:14.0) Gecko/20100101 Firefox/14.0.1,gzip(gfe)
X-Received-Bytes: 3006
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable