Recent content by Christoffer B

Thank you for your reply! I should have explained, one of the flanges goes to a turbomolecular pump and ion gauge - working pressure is about 10E-6-7 mbar. The plan is not to use pulses but to use so low light flux that the photoelectrons generated are in the range of 100's /second. The...

Hi! I'm playing around with a type of electron (and by electron/molecule interactions: ion) source that was briefly touched upon in the 1960's. The basic idea is to use a channel electron multiplier "channeltron" with the anode removed; similar to a single MCP channel. The burst of electrons...

The base bus and racks might be, but the nuclear ADCs and coincidence modules are still pretty unique to that field. The general construction of VME modules are simpler, though.

That's interesting to know. I have read that CAMAC modules were massively more expensive than both the preceding NIM modules and the VME ones that replaced them.

Good to know, thanks! I know it's oldschool, but as far as I've heard, they're still running on some older detector arrays and accelerators. There are a few companies still producing modules in the standard, even USB/ethernet crate controllers. SOMEONE must be buying them, even if it's only to...

Hi! I've done some research on the CAMAC standard of nuclear electronics - "It's like NIM but digital" - as I would like to acquire a bin and some modules for historic and scientific curiosity. I have never worked with the system, and I would like to get in touch with somebody who has. How...

Thanks for your reply! I'm hoping to get crude structural analysis resolution, so ppm level is likely needed. Sorry for the poor description, here's a link to the discs I purchased:https://www.ebay.com/itm/102mm-x-5mm-Round-Disc-Circle-Mild-Steel-Sheet-Plate-Size-/264306833910? I guess you...

Hi all, I'm fairly new here. I'm currently designing an as-homogene-as-possible permanent magnet for low-field NMR and similar experiments. I'm on a fairly tight budget, and having finally found pole pieces for my magnets, I got them even though they have a small saw cut in the edge. approx. 5...

It would be useful to know how it's constructed, is it shielded against EM radiation? Could there be a high impedance leakage path between the plates (could be grease/dirt on standoffs etc.) -Chris

Hi! Been browsing this forum for years, thought it might be a good time to actually join :) I'm a graduate student in organic chemistry, and in my spare time i design and prototype scientific instruments. I've just completed a gas chromatograph, and am working on several other instruments...