Re: Obsidian
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Is there a what looks like a UHF SO-239 connector on the head or the CU series power supply or your version of the LIXI PSU? om: GEOelectronics@... To: [email protected] Sent: Sunday, January 24, 2021 9:53:55 PM Subject: Re: [XRF] Obsidian This one is the PS-500-OS power supply- this version has no HV power supply inside, it is in the head. There are two versions, one controls the HV generator in the head with 12V signals, the other has the HV power supply in the control box and LV cables to the head and a single HV cable looks like RG-8. That's the newer kind and the style of the one in the basement here. I've worked with a several? of both styles in the past but only have the 2 now. From: "DFEMER" <dfemer@...> To: [email protected] Sent: Sunday, January 24, 2021 8:48:17 PM Subject: Re: [XRF] Obsidian I have 2 Kevex CU015 power supplies for the head and a LIXI PS-500-OS. What setup are you running? Dud ? From:
[email protected] [mailto:[email protected]] On
Behalf Of GEOelectronics@... ? Was that out of a LIXI and has a LIXI controller or does it use a Spellman power supply? ? ? From: "DFEMER"
<dfemer@...> ? No they¡¯re just sitting there I haven¡¯t fired it up with anything yet. The plan was to use them with the SiLi detector when I get a load of LN2 but the SDD is so much easier and nicer. Can you run the comparison tests, I¡¯m curious to see the difference. Dud ? From:
[email protected] [mailto:[email protected]] On
Behalf Of GEOelectronics@... ? Dud are you using your Kevex? If so on what? Geo ? From: "DFEMER"
<dfemer@...> ? That should be the same one I have here a Kevex W micro focus. I ?don¡¯t see why you need to have 2 positions or a detector collimator, it will work fine with just ?a close up detector and no collimator. For low energy work you run a 15 kVp beam. You want to set the beam voltage about 10 keV above the K edge. Run 2 test shots, no detector collimator close up and with collimator close up. Try a 15 or 20 kVp beam if it¡¯s not filtered which I don¡¯t think the Las Vegas one was. ?All XRF needs to be done close up to maximize signal and minimize air absorption. What is you close up and far distance? You should be able to see Si, K, and Ca as they are important in determining what type of rock you¡¯re looking at. Dud From:
[email protected] [mailto:[email protected]] On
Behalf Of GEOelectronics@... ? Low energy is for below W L peaks, like K and Ca. Low energy from sample can't travel far in air, needs to be really close, the W L lines don't interfere with the wanted rays. ? What I have now is the same unit I had in Las Vegas in 2013. ? ? From: "DFEMER"
<dfemer@...> ? Geo, What is the high energy position and purpose for both? I¡¯m seeing W in the spectra is this the high energy position run? What Is the purpose of the W 1mm collimator on a 25mm detector? The collimator and filter is used on the x-ray exit. ?Can you do the same run without it and close up detector. The newer commercial units use a 45 deg setup with the detector the closest to the sample and it runs well down into the 1-2 keV range. Dud ? ? ? ? ? ? ? ? ? ? From:
[email protected] [mailto:[email protected]] On
Behalf Of GEOelectronics@... ? Back to Obsidian.? ? ? ? |