X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com X-TCPREMOTEIP: 207.224.51.38 X-Authenticated-UID: jpd AT noqsi DOT com Content-Type: multipart/signed; boundary="Apple-Mail=_6FBB8E16-7437-4B0C-8975-0D69DBCD2DC0"; protocol="application/pgp-signature"; micalg=pgp-sha512 Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Subject: [geda-user] OT: ballooning X-Pgp-Agent: GPGMail From: John Doty In-Reply-To: Date: Tue, 4 Jul 2017 19:22:18 -0600 Message-Id: <4733B1AC-D60F-42C6-A7AB-A3259D937A9B@noqsi.com> References: <54282517-6681-7931-7f10-23a9c4882f99 AT neurotica DOT com> To: geda-user AT delorie DOT com X-Mailer: Apple Mail (2.1878.6) Reply-To: geda-user AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: geda-user AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk --Apple-Mail=_6FBB8E16-7437-4B0C-8975-0D69DBCD2DC0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 On Jul 4, 2017, at 2:53 PM, Stephan B=F6ttcher wrote: >>> No, sorry. What I have is for the RPi1. I hope to launch it on a >>> balloon into the stratosphere next week: >>>=20 >>> http://www.ieap.uni-kiel.de/et/people/stephan/rpirena/ I used to do that stuff a long time ago. Last time was 1975, with a ton = of gondola carrying NaI/CsI =93phoswich=94 scintillation detectors for = hard x-rays. We sent it up with a 1.5 million cubic meter =93zero = pressure=94 helium balloon. > That slope can be the tail of the noise or indeed some x-ray > background. It looks like the tail of the noise to me. Might also have some poorly collected charge. The outer edges of these = diodes are usually not depleted: you=92ll collect some charge from a = track by diffusion, but you=92ll lose some of it, too. > The light can be measured with the same kind of silicon > photodiodes. The calibration is not as easy, since the light yield > depends on temperature and doping of the scintillator, on the shaping > time of the electronicsm and the resulting balistic deficit, which is > the light that comes to late to be integrated by the shapers. The = time > profile of the light emission depends on temperature as well. In the old days we used photomultipliers. At least with diodes you don=92t= have to worry about magnetic fields changing the gain! John Doty Noqsi Aerospace, Ltd. http://www.noqsi.com/ jpd AT noqsi DOT com --Apple-Mail=_6FBB8E16-7437-4B0C-8975-0D69DBCD2DC0 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQIcBAEBCgAGBQJZXD9KAAoJEF1Aj/0UKykRl84QAIFIdmoIVB5sjKV0ZCcbtJ0C WDAMBLGxUG7SzHyp1DTy2tl0eAvXsF61wr7ZHgfAra8FpL5odjLhuR1X3HAk7T2l BBkqJsQzKiba5h+I+BlAmx8l1HoCMoMElQvsilFO5CU9O7bGAmbNS3YyAhJ15xxK S6rHrMBfcRJiQBS6tQIHux2Sy5S+gkOS6JH7AQKlZWZEfqPqBFdXzupnuOJT1sUn M1ykasS6DwyIJ+/YGVPMXIeE1bDuFthzq3yboR1+TbG8WByHkQlaTwsvTQDnc8W4 GrbE+YucVEagHdpXkJQLce6vUXgvG/IaVs2oqnfp7VQ7Kw3A+UdADmTbtUr1yXVe QdNuy9DH567xbKoJG06GlSXIpBmbU0+DyCwZhKdtYUIoCuuPwUFldysziptmK+Lw 5J3nh85guK8xVER/TxYqTdCbVAMMu+YX+vOjPybFlLc54hGcfy+L96t66ce0dMc4 05WFLyChnMiH06OIiTGvAImxM7BG7rbmjdKG1Z2IVDy+7tnPiRRCOVylsDntYosT TLwagXnmnFqKLerGMnsJgfGRLkXO1BBW9bjjzUbJASkt4yk8EBrdTNPpsweOBIwu oA8ZOvxkqf/WhBaNYDlwPUcDTlDrZHZDdEZTnaQwsBV/hfvYCRyX5fQmDb4tUQub 6tFox1GbgBfux/VYX7Om =nr+s -----END PGP SIGNATURE----- --Apple-Mail=_6FBB8E16-7437-4B0C-8975-0D69DBCD2DC0--