Search found 21 matches

by Luke Harrill
Wed May 29, 2019 7:08 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: NIM/He3 Frustrations
Replies: 6
Views: 6009

Re: NIM/He3 Frustrations

I have not tested the setup with a neutron source yet, but only a decent amount of radium, to which it did not respond at all. This morning I went and bought an o-scope, as no one near me had one. It is a Leader LBO-524 40 MHz. (I also repaired my LBO-508 20 MHz today.) Although it does not have a s...
by Luke Harrill
Thu May 23, 2019 3:20 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: NIM/He3 Frustrations
Replies: 6
Views: 6009

Re: NIM/He3 Frustrations

Under normal circumstances, I would agree with you about that being an issue. However, it was given a restoration by Richard just a few years back, and seems to still be running well. (The thing has more 12ax7's than you can shake a stick at anyways...) I do wonder if you can somehow run the output ...
by Luke Harrill
Wed May 22, 2019 10:31 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: NIM/He3 Frustrations
Replies: 6
Views: 6009

NIM/He3 Frustrations

Right now I pretty much have everything complete. I have made runs with H2 and more than adequate current/voltage. However, it isn't worth anyone's time to report on that without neutron measurements. Some problems have left me in the dark. My setup currently consists of the following ran out of a T...
by Luke Harrill
Wed May 22, 2019 9:54 pm
Forum: Items For Sale
Topic: [REQUEST] Bubble Dosimeter Rental/Sale
Replies: 0
Views: 2759

[REQUEST] Bubble Dosimeter Rental/Sale

Hello, I'm looking to either rent (<1 week) or buy a bubble dosimeter with a little life left in it. I can pay through PayPal or other methods. Just let me know as soon as possible.

-Luke Harrill
by Luke Harrill
Sun Mar 31, 2019 7:11 pm
Forum: Items For Sale
Topic: Luke Harrill's Trading Post
Replies: 5
Views: 3210

Re: Luke Harrill's Trading Post

Thank you, Rich! Yes, the ceramic to metal seals on many of such capacitors are vacuum tight. Specifically the hermetically sealed, oil-filled ones with a steel case. My current feedthrough is made from a NOS one that was intended to go on a 60kv capacitor. I purchased it from Richard Hull a while b...
by Luke Harrill
Thu Mar 28, 2019 6:45 pm
Forum: Items For Sale
Topic: Luke Harrill's Trading Post
Replies: 5
Views: 3210

Re: Luke Harrill's Trading Post

For Sale Listing #1 ~~~~~~~~~~~~~~~ Ebay Store Coming Soon! ~~~~~~~~~~~~~~~~~~~~~ #1.1 Welch 1397. - #1.2 Welch 1400. - #1.3 Braided 36" long SS hose. Conflat (2.75") to compression fitting (1.5"). - #1.4 Conflat (2.75") 4-way cross. - #1.5 Conflat (2.75") 2 pipe feed through. Both pipes have swagel...
by Luke Harrill
Thu Mar 28, 2019 6:00 pm
Forum: Items For Sale
Topic: Luke Harrill's Trading Post
Replies: 5
Views: 3210

Luke Harrill's Trading Post

General Information: -Listings below here will be numbered to aid in updating this post. -I am willing to ship the vast majority of what I have listed. Everything will be sent from the Gaffney/Spartanburg area of SC. -Local pickup can be arranged if you are in the area. -Payments I will accept are P...
by Luke Harrill
Fri Feb 22, 2019 6:22 pm
Forum: Images du Jour
Topic: Fusor Progress, Luke Harrill
Replies: 12
Views: 7753

Re: Fusor Progress, Luke Harrill

My first light!! (on 2-18-19) I couldn't wait any longer to start testing, so I wired the XRT to 120 VAC, threw together a grid, pumped the system down, and turned on the variac. I initally used only the Welch to get down to ~20 microns before turning on the power. After a bit of cleaning, I was dow...
by Luke Harrill
Wed Jan 09, 2019 4:33 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Neutron Test Sources Po210+Be or U238+Be?
Replies: 15
Views: 4864

Re: Neutron Test Sources Po210+Be or U238+Be?

Really this should have been asked in the new user area, as this is already explained in the FAQ.

viewtopic.php?f=31&t=5316
viewtopic.php?f=31&t=5504

I'm unsure of what you measured it with, but 62kcpm isn't exactly a hot rock.

-Luke Harrill
by Luke Harrill
Sun Jan 06, 2019 3:50 am
Forum: Vacuum Technology (& FAQs)
Topic: The Importance of TC Gauge Calibration
Replies: 13
Views: 7227

Re: The Importance of TC Gauge Calibration

Update: According to Bruce's gauge, my 1402 can pump down to 5.3 millitorr after ~15 min. I'm now waiting for an iso63 adapter to come in so that I can hook up both gauges at once.

-Luke Harrill