Radhwan Alnaimi

22 Questions 53 Answers 0 Followers

Questions related from Radhwan Alnaimi

Why is plasma refractive index -ve and no self focusing happen?

Hi, Self focusing does not happen in plasma as it has -ve refractive index, but why is it so. would it be attributed to the dominant free electrons and the phase velocity is higher than the speed...

28 March 2016 7,455 3 View

Has anyone used SRIM software (ions range in matter)?

Hi everyone, We are looking at the power of gases in ion's stopping. Can we use the SRIM for this, and are their any limitations for ions energy in the software? If so, is there any other software...

28 August 2015 2,295 23 View

Is the use of magnetic field efficient in the mitigation of debris in laser plasma sources?

Hi, Any idea about the relation between the plasma pressure and the magnetic field if a magnet is used to mitigate the debris particles in laser plasma sources especially tape drive targets? Many...

10 August 2015 5,761 7 View

Is there any difference between the vertical and horizontal source size in LPP x-ray sources?

In laser produced plasma. Do we see any difference in the the source size vertically and horizontally and why? Thanks, Rad

24 July 2015 2,223 7 View

Can Mylar tape target be used as efficient soft x-ray source in laser plasma sources?

Hi, I wonder if using Mylar in the tape drive target geometry would be good for a high- rep soft x-ray application. Or if anyone recommend other materials to be used instead in the tape drive, and...

15 July 2015 9,495 4 View

Is it possible to use long-pulse laser plasma sources for particles acceleration?

Hi, I wonder if it is possible to utilize long-pulse lasers to accelerate protons where the intensities are below 10^15 w.cm^-2, and why? Thanks Rad

02 July 2015 8,546 9 View

What would be the best way in resolving ions in laser plasma sources?

In laser plasma sources. What is the best way in resolving the ions emitting of the source? Many thanks Rad

04 June 2015 6,812 8 View

How to measure the spot size of the laser focus?

Hi, Can anyone recommend a safe procedure to measure the focused spot of laser beam. We calculated the focus spot size, but would like to measure it as well. I am thinking of using a set of glass...

25 May 2015 8,288 18 View

Would the polarization of a laser beam change after passing through a periscope?

Does laser polarization changes after passing through periscope that changes the direction with 90 degrees and why? Many thanks Rad

23 May 2015 362 9 View

Would the polarization of laser ablated beams change the source size in the laser produced plasma sources?

Hi, Dose anyone knows if polarization changing of the laser beam changes the x-ray source size. Doing the frequency multiplication changes polarization of the beam from P to S. and even if the...

21 May 2015 5,123 5 View

How would laser wavelength effect the x-ray source in laser produced plasma sources?

In laser produced plasma. What would the effect of ablated laser beam wavelength changing be on the x-ray source. Thanks

15 May 2015 6,350 1 View

Can I calibrate the x-ray line spectra by using only one known peak?

I am using a mica crystal to obtain the x-ray line emissions of the source which is Aluminium, and has obtained only one peak (k Alpha). Is it possible to calibrate the spectrum with only one...

08 May 2015 540 2 View

How can I count X-ray source intensity?

I am using a photo diode with known quantum efficiency to measure the intensity of my x-ray source. The diode's signal is measured in volts on a scope with known impedance. Can anyone help with,...

03 May 2015 9,115 11 View

Would laser polarization affect debris emission in LPP?

Does the polarization of the ablated laser beam has an effect on debris emission in LPP. Thanks Rad

09 April 2015 5,680 2 View

Which one is best to use EMT or MCP?

Hi, We are looking at electrons, protons and ions generated from our LPP x-ray source which passes through an electrostatic analyzer before reaching the detector. Can anyone tell us, which is best...

07 April 2015 5,399 7 View

Does anyone know a electrostatic Analyzer's COMSOL simulation?

Hi, Wonder if anyone knows whether we can simulate the ESA particle's trajectory using COMSOL software? Thanks, Rad

27 March 2015 6,754 1 View

Would a laser energy change the source size?

Does the changing of laser energy have any influence on the source size calculation in a tape drive laser plasma? Thanks Rad

19 March 2015 7,923 3 View

How do I describe electron static analyzer particle's motion?

Hi, How do we describe the motion of the ions and electrons in a circle under uniform electric field then connect this to the electron static analyzer. Thanks Rad

15 March 2015 1,877 6 View

Does anyone know how to refurbish an electron multiplier tube which has been exposed for a while to air?

We have an EMT which has not kept in a Desiccator for a period of time and its dynodes are contaminated (oxidized). Any idea on how to get rid of the oxidization? Thanks

12 March 2015 2,803 1 View

How can I get the resolution of Image Plate scanner?

Any idea how to get the resolution of the Image plate scanner when calculating the X-ray source size in a laser produced plasma. I am thinking of using a resolution mesh and wonder if there is...

09 January 2015 9,657 3 View

How can I measure the electron temperature in a laser produced plasma?

I am working on a high rep solid target system and would like to measure the electron temperature of the generated plume. any idea? Thanks, Rad

09 January 2015 4,440 10 View

How to filtrise scattered IR photons?

Does someone know how to filtrate IR scattered laser photons that is combined with soft x-ray emitting from a tape target in a laser plasma source without killing the signal of the x-ray?

18 September 2014 3,929 3 View