Re: 1 MeV protons through a thin film of water

Dear Sharmalee,

It seems to me that your initial beam energy is too low to go through
the water film.
Your proton energy is only 1 MeV and you start 1 cm before the water
film, already that passage through air will reduce the proton energy
substantially before reaching the water.
0.1 mm of water may also be too thick for a 1 MeV proton beam.
Try increasing the beam energy or reducing the distance between the
proton beam starting point and the water film.

Best wishes,
Mattias

Sharmalee Randeniya wrote:
>
> Dear Experts,
>
> I am trying to look at the scattering angle of protons after
> travelling through a water film of water of thickness 0.01 cm (The inp
> file is attached). The problem is that I am not seeing any protons
> behind the water film. I played with the following cards, but couldn't
> get to work.
>
> Please advice me...
>
> Thank you !
>
> Sharmalee Randeniya
>
>
> PART-THR -1.0E-6 1.0 1.0
> EMFCUT -1.0E-6 1.0E-6 0.0 sec2 0.0
> STEPSIZE 0.00001 0.001 sec2 0.0 0.0 0.0
> EMF-BIAS 0.5 0.2 3.0 sec2 sec2
> LAMBEMF

-- 
Mattias Lantz - JSPS Postdoctoral researcher
RIKEN Nishina Center
Radioactive Isotope Physics Laboratory
RIBF Building, Room 417
2-1 Hirosawa, Wako-shi
Saitama 351-0198
Japan
phone:  +81-(0)48-462-7946 (secretary)
fax:    +81-(0)48-462-4464
email:  lantz_at_ribf.riken.jp
Skype:  milantzelot