Search found 85 matches

by Harald_Consul
Thu May 30, 2019 8:24 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: x-ray spectroscopy of beam target for fusion-helium?
Replies: 6
Views: 7704

Re: x-ray spectroscopy of beam target for fusion-helium?

Thanks Dennis.

There is only one point I do not understand. In which way would a silver target help me out of the helium detection problem?
by Harald_Consul
Mon May 27, 2019 12:39 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: x-ray spectroscopy of beam target for fusion-helium?
Replies: 6
Views: 7704

Re: x-ray spectroscopy of beam target for fusion-helium?

There were two words missing in my statement. It must be: "If I could do an x-ray spectroscopy of the deuterium filled beam target (which is out of irridium or palladium material) afterwards the beam fusion experiment, the whole beam on target apparatus would be much more cheaper than live fusion de...
by Harald_Consul
Mon May 27, 2019 9:34 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: x-ray spectroscopy of beam target for fusion-helium?
Replies: 6
Views: 7704

x-ray spectroscopy of beam target for fusion-helium?

I have managed to get my x-ray scintillation probe running. I cannot tell about the its sensing quality yet. I just quick testet it in front of a CR-tube and measured, if it does produce a signal. My approach is beam on target fusion (instead of plasma Hirschman fusor). If I could do an x-ray spectr...
by Harald_Consul
Sun Mar 31, 2019 6:06 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Making a SHV connector
Replies: 14
Views: 10738

Re: Making a SHV connector

Interesting.

Before, I thought a connector would be much too short to significantly influence the impedance (AC resistance) of a cable.

One learns a new thing every day.
by Harald_Consul
Sat Mar 30, 2019 4:19 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Making a SHV connector
Replies: 14
Views: 10738

Re: Making a SHV connector

Of course the 3rd photo is an SHV connector (not MHV). I have corrected this now. Well John, afaik connectors in contrast to cables do not have a significant resistance at all. As the 50 Ohm ending (as working resistor) has been a standard in the lab for a long time, I thought "50 Ohm" had become so...
by Harald_Consul
Fri Mar 29, 2019 11:09 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Making a SHV connector
Replies: 14
Views: 10738

Re: Making a SHV connector

Thank you for providing your expertise in dielectric strength, guys! To be more useful now, I just want to add the trivial information, that also the physical dimensions of (50 Ohm) Signal BNC, MHV-BNC and SHV-BNC are different. (50 Ohm) Signal BNC Connector male: 50Ohm_BNC_Connector.jpg MHV-BNC Con...
by Harald_Consul
Fri Mar 29, 2019 10:41 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: How to figure out the HV Polarity of Hamamatsu Photo Multiplier Tube inside a Scintillator
Replies: 2
Views: 3586

Re: How to figure out the HV Polarity of Hamamatsu Photo Multiplier Tube inside a Scintillator

Thanks Rich. You can be sure, I invested some time on learning the ropes of electrical scintillator designs. I am going to study your clue, now. Am I correct with "wrong HV polarity does not harm a photo multiplier tube" (as it would not generate any current at alll) ? Maybe I should just precaution...
by Harald_Consul
Thu Mar 28, 2019 5:41 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Making a SHV connector
Replies: 14
Views: 10738

Re: Making a SHV connector

Very good explanation Rich! As your are our BNC expert in the forum, now, maybe you could give a little addition. ;-) Most of the time high voltage BNC connectors are named as MHV-BNC conectors. You call "your" voltage connectors SHV-BNC connectors. What is the difference to MHV-BNC? High voltage BN...
by Harald_Consul
Thu Mar 28, 2019 2:02 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: How to figure out the HV Polarity of Hamamatsu Photo Multiplier Tube inside a Scintillator
Replies: 2
Views: 3586

How to figure out the HV Polarity of Hamamatsu Photo Multiplier Tube inside a Scintillator

Hello! This issue is about my Rigaku scintillation tube probe I've bought second hand on Ebay. With the great help of the German electronics forum I have figured out the pin assignements of the integrated preamplifer, respectively the of the 5 pins of the Hirose connector (which are connected to it....