Recent content by david allen

I am going to make a langmuir probe but I have heard there is a circuit for that, is there any circuit for driver of the probe? any help would be appreciated.

I could not figure out definition of arc voltage and arc current. Is that true arc voltage if the potential differences between dual electrode and the current is flow through one of these electrode? any help would be appreciated.

the answer shows the track too me. Hence I've got a question in implanters, the equation between impurities, time on the wafer because if beams radiate impurities on that area is too high.

Hi I could not figure out what is the reason of measuring current in accelerator and it shows which features of the beam? any help would be appreciated.

Hi I am looking for ion density an ion mass of Boron 10, the particle of BF3 but I could not figure out these 2 number yet. I really need them to calculate the frequency of the particle isotope. any help would be appreciated.

Hi there are two frequency of plasma. the first one is electron plasma and the second one is ion frequency. I want to know in freeman or bernas ion sources are using which one of these frequency to collision the gas and provide plasma and what is the reason of that.Any help would be appreciated.

I really appreciate for your replay. I have got this book that is great but it did not mention for sort of details such as what is the best length of FILAMENT or the best distance between chamber and filament and the best element for using in arc chamber. thank you

Hi I am searching on freeman ION SOURCE for my BS thesis. I have lots of problem about the material of the FREEMAN ION SOURCE and sizes of all the part to have the best design and better beam density. I need some details. Any help would be appreciated.