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Recent content by Olwood

  1. O

    337 nm pulsed Nitrogen laser energy output

    Thank you for this. I will perform assessment with no attenuation next week.
  2. O

    337 nm pulsed Nitrogen laser energy output

    Thank you for the replies. The meter is a thermal LPM, yes. I will add the specs later today. The laser specs are: - up to 400 uJ per pulse - 0 - 20 Hz - 4 ns pulse width Meter specs Molectron J9LP 8096 519 V/J @1064 nm This does work with a similar pulsed laser so I suspect over...
  3. O

    Lasers and Ionization

    Not necessarily. I prefer to talk in terms of wavelength - shorter wavelength = higher frequency so you're correct to some degree as UV lasers are certainly prevalent in ionisation techniques (see MALDI MS). However visible and even infrared (so longer wavelength, lower frequency) lasers are...
  4. O

    337 nm pulsed Nitrogen laser energy output

    I'm struggling to get an energy reading from a pyro electric laser energy meter measuring one of my pulsed nitrogen lasers. On another similar similar laser readings are fine, so I assume the meter is working fine. These are research grade lasers meant for ionisation. Both lasers produce visible...
  5. O

    Lasers and Ionization

    As suggested in this post there are many mechanisms for ionisation from a laser pulse, and there is still conjecture over which theories are correct. For example proton transfer, which is seen in laser desorption ionisation (LDI), typically generates ions with a 1+ charge. It is an immensely...
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