Presentation by Dr. V. C. Sahni, Director, RRCAT - Raja Ramanna ...

High Resolution VUV Beamline at Indus-1 (450 MeV)
Synchrotron Source
for
High Resolution studies of Atoms/Molecules for probing
high-lying energy states
Identification of Rydberg states
Determination of ionisation potential of atoms/molecules
Measurement of photo-absorption cross-sections of individual and rotationally
resolved absorption lines
1.8
1.6
1.4
1.2
1261.55 A
(Carbon)
1243.18 A
(Nitrogen)
Vacuum UV line of
carbon and nitrogen
recorded by the
spectrometer
Signal (V)
1.0
0.8
0.6
1228.79 A
(Nitrogen)
0.4
0.2
40 60 80 100 120 140 160
PMT position (mm)
Wavelength Range:
Monochromator:
700-2000 Å
Indigenous off-plane
Eagle spectrometer