Search found 613 matches

by Steven Sesselmann
21 Jun 2019, 07:24
Forum: Shielding
Topic: GS-STANDUP
Replies: 8
Views: 2617

Re: GS-STANDUP

Christopher,

Yes I agree, when you have too much fun working you never get a holiday, I think 2003 was the last time I had a vacation too :)

Steven
by Steven Sesselmann
20 Jun 2019, 16:55
Forum: Shielding
Topic: GS-STANDUP
Replies: 8
Views: 2617

Re: GS-STANDUP

Christopher.

Forum has been active lately so you might have missed this post https://www.gammaspectacular.com/phpBB3 ... f=21&t=525

As you can see I couldn't resist the temptation ;)

Steven
by Steven Sesselmann
17 Jun 2019, 12:18
Forum: Spectrum
Topic: Trinitite - Radioactive Glass from the First Nuclear Bomb Explosion
Replies: 6
Views: 369

Re: Trinitite - Radioactive Glass from the First Nuclear Bomb Explosion

Massimo,

As always, a very nice report, and I think you will agree, it's time to construct some sort of shielding.

Even a small amount of lead will significantly reduce your background.

Steven
by Steven Sesselmann
15 Jun 2019, 12:37
Forum: The lounge
Topic: Bought myself a new toy..
Replies: 7
Views: 366

Re: Bought myself a new toy..

Are you printing in ABS? My favorite material after many experiments is PETG. At the moment I am just printing in PLS, but I wan't to try some other materials too. Laser engraving sounds interesting, possibly more useful, but I imagine it would be a bit dangerous without some kind of enclosure. I t...
by Steven Sesselmann
13 Jun 2019, 12:13
Forum: The lounge
Topic: Bought myself a new toy..
Replies: 7
Views: 366

Bought myself a new toy..

Hi All, I have been wanting to buy myself a 3D printer for some time, and finally Christopher Lloyd and Elizabeth Lang, who both suggested improvements to the GS-STANDUP have pushed me over the line. I bought the Anycubic 13 mega, really impressive printer considering the $299 price tag including sh...
by Steven Sesselmann
11 Jun 2019, 10:24
Forum: Spectrum
Topic: Torbernite (Natural Uranium)
Replies: 4
Views: 289

Re: Torbernite (Natural Uranium)

Massimo, Thanks again for an excellent post, I commend you for your consistency and attention to detail. I notice you are operating close to 2000 cps, which must be close to the limit of what your sound card can count, but from your three comparisons above it looks as if you are not loosing too many...
by Steven Sesselmann
08 Jun 2019, 11:10
Forum: Detectors
Topic: Quick way to kill a PMT
Replies: 3
Views: 245

Re: Quick way to kill a PMT

Luuk, I don't know exactly how long it was exposed, but my guess is less than 30 seconds. Despite the photocathode appearing to be stripped off, it still works, but the efficiency is lower. I think a fail safe solution would be to build a black box with an SHV connector that protrudes through a hole...
by Steven Sesselmann
07 Jun 2019, 08:10
Forum: Detectors
Topic: Quick way to kill a PMT
Replies: 3
Views: 245

Quick way to kill a PMT

Hi All, A few days ago I did something really silly, and I should have known better. I was using a brand new 3" PMT to test the resolution of some new crystals, and I was temporarily mounting the crystals to the pmt and running resolution tests, somehow in my absentmindedness I forgot to disconnect ...
by Steven Sesselmann
29 May 2019, 16:13
Forum: Shielding
Topic: GS-STANDUP
Replies: 8
Views: 2617

Re: GS-STANDUP

Hi All, I made a couple of GS-STANDUP's today and added a few improvements. Amazing what a bit of practice does, they come out looking better. If I was living in the middle ages I would probably have been a tin smith, but now you can just call me the Wizard of Oz :D So instead of fitting a copper li...
by Steven Sesselmann
27 May 2019, 09:47
Forum: Spectrum
Topic: Fukushima Soil Sample "Reloaded" with both Cs134 Peaks
Replies: 9
Views: 526

Re: Fukushima Soil Sample "Reloaded" with both Cs134 Peaks

Massimo,

Nice analysis, showing that the contaminated soil is around 42% higher than your normal background.

Keep in mind that normal background varies from place to place.

Steven