Search found 148 matches

by Scott Moroch
Wed Apr 01, 2020 8:54 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Help using Canberra 8701 ADC for MCA and *more* Neutron Issues
Replies: 3
Views: 86

Re: Help using Canberra 8701 ADC for MCA and *more* Neutron Issues

Luke, I am not familiar with the Canberra units, but my friend Jay Howson is. Below is a writeup he did on our website of how he made use of the Canberra modules for spectroscopy: http://www.nuclearphysicslab.com/npl/npl-home/spectroscopy/software_and_hardware/diy-canberra-system/ Sorry if this does...
by Scott Moroch
Sat Mar 28, 2020 4:55 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Fusor V construction - the process long running
Replies: 21
Views: 1718

Re: Fusor V construction - the process long running

Robert,

It is likely a rotatable conflat. He will have to insert the inner SS ring with the knife edge. It looks like the feedthrough is welded or Silver Soldered to the outer SS ring. Look at the picture I attached for reference.

Scott
by Scott Moroch
Sun Mar 22, 2020 5:30 pm
Forum: Interesting Links
Topic: "Nuclear Physics Lab" Website
Replies: 4
Views: 328

"Nuclear Physics Lab" Website

Hi everyone, Over the past few weeks our amateur science group (Tim Koeth, Jim Krutzler, Jay Howson, Brian Beaudoin, Miriam Hiebert, Luke Gilde, and myself) have assembled a website which details all of our projects. It is still a work in progress (and will continue to be), but a lot of content has ...
by Scott Moroch
Wed Mar 11, 2020 2:49 am
Forum: Vacuum Technology (& FAQs)
Topic: McMaster Carr's oddly inexpensive turbopump
Replies: 7
Views: 540

Re: McMaster Carr's oddly inexpensive turbopump

Ian,
A brand new Pfeiffer Pumping station is $500 cheaper than the Mcmaster listing on IdealVac: https://www.idealvac.com/NEW-Pfeiffer-H ... pp/P107317

Still not affordable for the amateur, but available nonetheless.

Scott
by Scott Moroch
Sat Dec 14, 2019 3:09 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Fusor V Chamber
Replies: 20
Views: 6322

Re: Fusor V Chamber

I am by no means disagreeing with the statement: would "devour Deuterium like a vacuum cleaner." However, it is worth noting that larger systems maintain star mode at lower pressures. The fusor Tim Koeth and I built (larger than that chamber) maintains star mode between 2-4 mTorr. My 9" spherical ch...
by Scott Moroch
Wed Dec 11, 2019 12:42 am
Forum: Ion Gun Design and Construction (& FAQs)
Topic: 30keV Deuteron Source
Replies: 9
Views: 1830

Re: 30keV Deuteron Source

Roberto, To your first question: yes, the bottom of the glass tube is the gas inlet Second question: Yes, I have read about those ratios. The spacing was increased for that photo to demonstrate variability. Ultimately the spacing will be based on a SIMION model I have built of the entire beam line. ...
by Scott Moroch
Sat Dec 07, 2019 6:22 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: 30keV Deuteron Source
Replies: 9
Views: 1830

Re: 30keV Deuteron Source

Ian,

The ceramic on the Einzel Lens is Macor. The first and third electrodes of the lens are grounded and the middle is at a positive potential (400-1kV depending on desired focal length).

Scott
by Scott Moroch
Fri Dec 06, 2019 7:31 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: 30keV Deuteron Source
Replies: 9
Views: 1830

Re: 30keV Deuteron Source

Ian, The ceramic is a high voltage break, electrically isolating the ion source from ground and allowing it to float at 20kV. See the full CAD rendering with a circuit below. The voltage drop across the diodes allows for a DC plasma discharge, and the voltage drop across the resistor is the extracti...
by Scott Moroch
Fri Dec 06, 2019 3:35 am
Forum: Ion Gun Design and Construction (& FAQs)
Topic: 30keV Deuteron Source
Replies: 9
Views: 1830

30keV Deuteron Source

I have been working on developing a Capacitively coupled ion source and Einzel lens for generating 30keV deuterons. Right now the source is being operated in DC discharge mode with just air. The anode is floating at 17kV and the cathode at 15kV. A chain of 400 volt zener diodes are used to self bias...
by Scott Moroch
Tue Jul 30, 2019 2:08 am
Forum: Images du Jour
Topic: Magnetic Mirror
Replies: 5
Views: 3203

Magnetic Mirror

This post shows a magnetic mirror built recently by Tim Koeth, Jay Howson, myself and Jimbo Krutzler. It was a fun project!

Everything was acquired surplus. More to come! Enjoy the photos.