Dragonfly Digital Neutron Detector - Updated 11/05/23

[Helen Gayo]

This year at HEAS, Joe and I introduced our new, completely digital and turnkey Dragonfly Neutron Detector.

It’s composed of a:
• Charge-Sensitive Preamplifier
• P/Z Correction Stage
• Gain Stage
• Baseline Restore
• Single-Channel Analyzer
• High-Speed Digital Counter
• 0-1200V Ultra-low Noise Power Supply
• USB-C Interface (Software Included)

Since there was so much interest in this system, we have created a mailing list to communicate exciting product launches, with our first announcement coming this week.

If you’re interested in learning more, please sign up here!
http://eepurl.com/iBliys

[Andrew Seltzman]

Is that the same Nucleon Power Inc of Oak-ridge with the beam on beam neutron source?

[JoeBallantyne]

Yes.

Joe.

[Helen Gayo]

Yes. We developed this for a neutron detector array, and decided to offer it as a product. It is now available for sale.

[Andrew Seltzman]

Fantastic, I was talking to Amanda at IAEA-FEC last month, we hope to be able to use your neutron generator for high DPA materials studies.

What detector material does this neutron detector system use?

[Helen Gayo]

Nucleon's high-flux system uses fast-neutron scintillation detectors (which require pulse-shape discrimination), but the version that we are offering here is intended to be used with proportional tubes or proton-recoil detectors.

We have additional modules in the Dragonfly series coming that will have more advanced capabilities for neutron and gamma detection.

[Andrew Seltzman]

Ah, so this unit does not include a detector?

[Helen Gayo]

Sorry for the confusion, we are offering this in a package with a He-3 tube. We've just sent the information out to the new subscribers.

[Richard Hull]

I am a subscriber. (see Helen's first post in this thread.)

They do offer the 3He tube in the combo package for $1195

I might be wrong but the tube seems to be a 20 ATM tube! I bought one of the tubes from Joe and Helen at HEAS#34 last month. I called LND with the tube number and mine was a 20 ATM 3He tube. I checked the data sheet on line and oddly they do not note the pressure. The call netted me an apology for not putting the pressure sheet in their on line sheet. They sent me a diagram with pressure noted on it. (attached PDF)

Please note that their 1200 volt supply might not work most BF3 tubes nor most larger 3He tubes that demand 1400-1800 volts. Obviously it will work with their supplied tube, as LND notes it works at about 1000v bias. It will most likely work with most any PMT scintillator setup. I only mention this as "Dragonfly" pre-amp was offered separately at HEAS. If it is ever offered up separately, just be aware of the supply limitation as related to any neutron detector you may have.

If you have the coin, this seems like a one stop setup for warranted, reliable neutron counting, and future PMT scintillation projects. What's more, the package comes with software!

Richard Hull

[Rex Allers]

From Richard,
" I checked the data sheet on line and oddly they do not note the pressure."

That surprised me. I went to the LND page and sure enough, the useful data sheet has been disappeared. Huh, why? I though surely it must be there but I couldn't find it.

Here is the one I got there in 2016...

LND 25169 He3.pdf

(25.98 KiB) Downloaded 27 times

First data line is, Gas pressure (torr) 15200
and 15200 torr is the same as 20 atm.
Lots of other better details than what is on LND pages now. Sheesh, more creeping internet crapification.

Richard, you knew all this some time back...
"Carl Willis posting on E-Bay 3He tubes -- Re-Post by Richard Hull"
viewtopic.php?p=34724

Searching the forum for 25169 brings up more posts.

Side note: The 25169 was used as the neutron detector in the
SAIC Exploranium GR-135+ "The Identifier" with the neutron option.
maybe I'll make a separate post on that.

[Finn Hammer]

I subscribed too, but I have not receivez any orrespondence or offers. Sorry, but don't know where else to adress this.
Cheers, Finn Hammef

[Helen Gayo]

Hello Finn,

Is it possible the email went to your spam? The emails are sent via Mailchimp and it shows you were included in the first round. I will add you to the round of new subscriber emails being sent out today as well, so if you don't receive one today in your spam, please send me a message.

Thank you to everyone who has placed an order already, we will begin shipping this week!