Dear all 

After I changed a broken filament, I could not find signal signal any more. I opened the ion source and  checked the filament looks fine. I tried to play with the focusing but there is no luck. Does any body have any idea or suggestion what to do?   

Best regards 
Getachew A. Adnew 
Getachew A. Adnew 
PhD student                  
email: [log in to unmask]
Institute for Marine and Atmospheric Research Utrecht (IMAU)
Princetonplein 5
Utrecht University
3584CC Utrecht, The Netherlands
Phone: (+31)-30-2531555