Search found 48 matches

by Chris Mullins
Sun Jan 20, 2019 2:54 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Integrated Lab Measuring and Controlling (Labview, Labjack, ...)
Replies: 34
Views: 977

Re: Integrated Lab Measuring and Controlling (Labview, Labjack, ...)

Well, "future-proof" and "PC-based" are two terms that don't really go together in general, unless you're willing to lock down the PC once things are working (no OS upgrades, no changing PC hardware, not networked, etc.) Speaking generally for long-lived systems, it's best to avoid consumer hardware...
by Chris Mullins
Sat Jan 19, 2019 8:33 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Integrated Lab Measuring and Controlling (Labview, Labjack, ...)
Replies: 34
Views: 977

Re: Integrated Lab Measuring and Controlling (Labview, Labjack, ...)

Sorry, I may not have been clear earlier. With USB, one side of the interface is the host , and the other is the peripheral . The host is the PC, and the peripheral is the device connected to the PC (e.g. a scope). Technically there is a provision for swapping these roles, but it's not common. There...
by Chris Mullins
Sat Jan 19, 2019 2:53 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Integrated Lab Measuring and Controlling (Labview, Labjack, ...)
Replies: 34
Views: 977

Re: Integrated Lab Measuring and Controlling (Labview, Labjack, ...)

The USB hardware on a PC motherboard is the host controller. Naturally the reality is a bit complicated (e.g. there multiple standards, some proprietary), but the USB host controller interface to the OS is standardized enough that a mainstream motherboard's USB hardware is usually OS-independent, ev...
by Chris Mullins
Wed Jan 16, 2019 1:23 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Integrated Lab Measuring and Controlling (Labview, Labjack, ...)
Replies: 34
Views: 977

Re: Integrated Lab Measuring and Controlling (Labview, Labjack, ...)

For high speed data acquisition, I'll use a Siglent scope permanently dedicated to my system. Two channels at up to 1Gsamp/sec, 14Msample storage is pretty good for under $400, and can always be put back in service as a standalone scope. I can't stream high speed data to the PC continuously, but I h...
by Chris Mullins
Tue Jan 15, 2019 1:39 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Integrated Lab Measuring and Controlling (Labview, Labjack, ...)
Replies: 34
Views: 977

Re: Integrated Lab Measuring and Controlling (Labview, Labjack, ...)

MegunoLink (https://www.megunolink.com/) is something I plan to try when adding computer control to my setup. I haven't used it before, but it looks promising. I've never been a fan of LabView - too high level for my tastes.
by Chris Mullins
Thu Jan 10, 2019 2:29 am
Forum: New User Chat Area
Topic: Firsts?
Replies: 6
Views: 319

Re: Firsts?

Getting one of those cheap precipitator HV supplies to work in a fusor would be a new accomplishment I think. Here are couple of discussions about them: Precipitator power supplies? http://www.fusor.net/board/viewtopic.php?f=11&t=11474 Test of Chinese Precipitator Supply http://www.fusor.net/board/v...
by Chris Mullins
Sun Jan 06, 2019 5:55 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: AD-25-500 Russian alpha particle detector
Replies: 5
Views: 872

Re: AD-25-500 Russian alpha particle detector

I made some more progress exploring the AD-25-500 detector. Now the detector is under vacuum, and to avoid noise problems, I put the entire CSA board in the chamber too. Only power, ground, detector bias, and pulse shaper output go outside the chamber. CSA board (covered with black tape on both side...
by Chris Mullins
Fri Jan 04, 2019 2:03 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: AD-25-500 Russian alpha particle detector
Replies: 5
Views: 872

Re: AD-25-500 Russian alpha particle detector

Well, it arrived (early actually). The ebay seller has been very responsive with some questions I had. I haven't had time to do anything serious with it yet, but I did hook the detector to the CSA/shaper board and fired it up. I taped the detector to a KF25 weld flange to make a small shielded "cham...
by Chris Mullins
Fri Jan 04, 2019 1:39 am
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Request for Verified Specifications of Amateur Accelerators
Replies: 4
Views: 589

Re: Request for Verified Specifications of Amateur Accelerators

I'm sure this is far from the highest by any metric, but with my cyclotron I've got protons up to 70 keV at around 2 pA, and as high as 4 nA in the 5-10 keV range (woo hoo!) I've seen H2+ beam currents in the hundreds of nA, but I haven't paid as close attention to that. Beam energy is computed base...
by Chris Mullins
Fri Jan 04, 2019 1:03 am
Forum: Vacuum Technology (& FAQs)
Topic: Cleaning/Repairing Edwards E2M5
Replies: 13
Views: 728

Re: Cleaning/Repairing Edwards E2M5

A gauge that's been used by several here (I have two) is the MKS 901p, good from atmosphere down to 1E-5 Torr, with log analog output and serial interface. Here are a couple of discussions about it: General discussion: http://www.fusor.net/board/viewtopic.php?f=10&t=11533 RS-232 interface board: htt...