Search found 111 matches

by Joe Gayo
Mon Jan 27, 2020 3:18 am
Forum: Items For Sale
Topic: Digital X-ray dosimeters on ebay 15keV+ sensitivity
Replies: 8
Views: 1027

Re: Digital X-ray dosimeters on ebay 15keV+ sensitivity

Thanks. I’m going request to return the item.
by Joe Gayo
Sun Jan 26, 2020 5:14 pm
Forum: Items For Sale
Topic: Digital X-ray dosimeters on ebay 15keV+ sensitivity
Replies: 8
Views: 1027

Re: Digital X-ray dosimeters on ebay 15keV+ sensitivity

The one I received seems to have locked thresholds and doesn't adjust per the manual. Does anyone know how to restore factory defaults? (at the moment it constantly alarms on power-up)
by Joe Gayo
Mon Jan 20, 2020 5:52 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: First attempt at activating Indium
Replies: 5
Views: 748

Re: First attempt at activating Indium

Nice work Mark.

Here is my first gamma spec measurement.

- Indium Foil (100x100x0.1mm) sandwiched with 100x100x50mm LDPE blocks.
- 120sec exposure
- 1in^2 NaI Detector, 900V, 1000sec count
ADE1A604-0DC9-4E44-B4A7-5E08CD141E73.jpeg
1000sec Indium Spec
by Joe Gayo
Mon Sep 09, 2019 12:52 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 25133

Re: Joe Gayo's lab tour

New Record @ 4:46pm PST-

Cathode Voltage: 97932V (Ballast Resitor 100k Drop Subtracted)
Cathode Current: 14.38 mA
Pressure (D2): 1.865 Pa (Base Pressure Before Run: 9.866E-5 Pa)
Calibrated TIER: 4.217 E+7 n/sec
Q: 3.50 e-8

I believe n/sec and Q are amateur records.
by Joe Gayo
Fri Aug 30, 2019 8:56 pm
Forum: Announcements and Site Administration Topics
Topic: FUSOR.NET v4 is now LIVE!
Replies: 25
Views: 6427

Re: FUSOR.NET v4 is now LIVE!

Jon Rosenstiel's posts about his cube fusor seem to be missing ...
by Joe Gayo
Mon Jul 29, 2019 11:17 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 25133

Re: Joe Gayo's lab tour

This search helps: https://webbook.nist.gov/chemistry/mw-ser/

The strong presence (2.86E-7 Torr) of 5 amu correlated with high fusion rate runs temps me to believe this is DT.
by Joe Gayo
Mon Jul 29, 2019 4:32 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 25133

Re: Joe Gayo's lab tour

@Dan - I’m trying to complete the following list of possible detected species that’s relevant for fusors

AMU: Possible Species
1: H+
2: H2, D+
3: H3, HD, 3He, T+
4: D2, 4He, TH
5: D2H+(?), TH2+(?), DT
6: D3+, T2, C+

19: DHO, H2OH+, NHD2, CH3D
20: D2O, ND3, CD4
21: D2OH+, DTO
22: D2OD+, T2O
by Joe Gayo
Mon Jul 29, 2019 2:58 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 25133

Re: Joe Gayo's lab tour

I find it interesting that even after an hour it’s still there and it didn’t show up in lower fusion rate runs

What’s an alternate explanation for mass 5 if tritium isn’t present ?
by Joe Gayo
Mon Jul 29, 2019 12:27 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Joe Gayo's lab tour
Replies: 69
Views: 25133

Re: Joe Gayo's lab tour

More interesting data ... any guesses for amu 21 (DTO ?)
D2 Plasma Run - 90kV 15mA - 2.8mPa - 3.03E7 n_sec.png