====== Beam Induced Fluorescence Monitor - Overview ======

Kurzanleitung: {{ :projects:bif-monitor:bif_kurzanleitung_v1.0.pdf |Download}}

Christiane's slides form Jülich Meeting: {{ :projects:bif-monitor:vortrag_bif_jülich_2011_final.ppt.zip |}}

[[projects:bif-monitor:application|Current Application - BIF-Monitor @ UNILAC]] \\
[[projects:bif-monitor:current_research:overview|Current Research - Overwiev]] \\
[[projects:bif-monitor:current_research:profile_quality|Current Research - Profile Quality]]

[[projects:bif-monitor:technical_drawings:calibration_target|Technical Drawing - Calibration Target]] \\
[[projects:bif-monitor:technical_drawings:camera_mounting|Technical Drawing - Camera Mounting and Covering]] \\
[[projects:bif-monitor:technical_drawings:diagnostic_box|Technical Drawing - Diagnostic Box UNI-DK 1130]] \\
[[projects:bif-monitor:technical_drawings:diagnostic_box_mounted|Technical Drawing - Assembly Drawings]] \\
[[projects:bif-monitor:technical_drawings:linear_feedthrough|Technical Drawing - Linear Feedthrough UNI-DL 1140]] \\



{{:projects:bif-monitor:BIF-principle_72dpi.png|}}\\
''Schematic drawing of the BIF-monitor as installed at GSI UNILAC''

When beam ions collide with residual gas molecules, some molecules are ionized remaining in an excited state
with a certain probability. In a N2-dominated residual gas composition, a strong fluorescence at 390 nm < lamda < 470 nm (blue), of about 60 ns lifetime, is generated by a transition band to the N2+ electronic ground state. Since the actual amount of photons is limited by the convolution of gas- and beam density as well as the viewport apperture is limited, single photon detection is an important issue:

{{:projects:bif-monitor:detection-principle_new_72dpi.png|}}\\
''BIF detection principle - How the beam induced fluorescence light is imaged, intensifiend and detected''