Publications (15)
Enhanced hard X-ray emission from femtosecond laser irradiated microdroplets
M. Anand, A. S. Sandhu, S. Kahaly +2
We make a comparative study of hard x-ray emission from 15 m methanol microdroplets and a plain slab target of similar atomic composition at similar laser intensities. The hard…
A bright point source of ultrashort hard x-rays from laser bioplasmas
M. Krishnamurthy, Sudipta Mondal, Amit D. Lad +6
Micro and nano structures scatter light and amplify local electric fields very effectively. Energy incident as intense ultrashort laser pulses can be converted to x-rays and hot el…
Test vectors for Rankin-Selberg -functions
Andrew R. Booker, M. Krishnamurthy, Min Lee
We study the local zeta integrals attached to a pair of generic representations of , , over a -adic field. Through a process of unipotent averagi…
The Physics of the B Factories
A. J. Bevan, B. Golob, Th. Mannel +2003
This work is on the Physics of the B Factories. Part A of this book contains a brief description of the SLAC and KEK B Factories as well as their detectors, BaBar and Belle, and da…
Temporal Feedback Control of High-Intensity Laser Pulses to Optimize Ultrafast Heating of Atomic Clusters
M. J. V. Streeter, S. J. D. Dann, J. D. E. Scott +27
We describe how active feedback routines can be applied at limited repetition rate (5 Hz) to optimize high-power TW) laser interactions with clustered gases. Optimization of…
Dopant induced ignition of helium nanodroplets in intense few-cycle laser pulses
S. R. Krishnan, L. Fechner, M. Kremer +13
We demonstrate ultrafast resonant energy absorption of rare-gas doped He nanodroplets from intense few-cycle (~10 fs) laser pulses. We find that less than 10 dopant atoms "ignite"…
Asymmetric emission of high energy electrons in the two-dimensional hydrodynamic expansion of large xenon clusters irradiated by intense laser fields
V. Kumarappan, M. Krishnamurthy, D. Mathur
Energy spectra and angular distributions have been measured of electrons that are emitted upon disassembly of following irradiation by intense (10 W cm…
Strong light fields coax intramolecular reactions on femtosecond time scales
M. Krishnamurthy, F. A. Rajgara, D. Mathur
Energetic H ions are formed as a result of intra-molecular rearrangement during fragmentation of linear alcohols (methanol, ethanol, propanol, hexanol, and dodecanol) induced…
Laser structured micro-targets generate MeV electron temperature at W/cm
Angana Mondal, Ratul Sabui, Sheroy Tata +14
Relativistic temperature electrons higher than 0.5 MeV are generated typically with laser intensities of about 10 W/cm. Their generation with high repetition rate lase…
Hot ion generation from nanostructured surfaces under intense, femtosecond irradiation
S. Bagchi, P. Prem Kiran, M. K. Bhuyan +4
We present the effect of a nanostructured surface on the emission of ions and electrons from intense (5-36 Petwatt per sq.cm) femtosecond laser produced plasmas. Electrons from opt…
Evolution of dopant-induced helium nanoplasmas
S. R. Krishnan, Ch. Peltz, L. Fechner +13
Two-component nanoplasmas generated by strong-field ionization of doped helium nanodroplets are studied in a pump-probe experiment using few-cycle laser pulses in combination with…
Anisotropic "charge-flipping" acceleration of highly charged ions from clusters in strong optical fields
M. Krishnamurthy, D. Mathur, V. Kumarappan
The disassembly of molecular clusters (=50-3000) in strong optical fields is investigated using two-dimensional time-of-flight spectrometry. Very highly charged ions a…
Characterization of doping levels in heteronuclear, gas-phase, van der Waals clusters and their energy absorption from an intense optical field
J. Jha, P. Sharma, V. Nataraju +3
A simple mass spectrometric method has been developed to quantify dopant levels in heteronuclear clusters in the gas phase. The method is demonstrated with reference to quantificat…
Enhanced hot electron generation from liquid jets in moderate intensity laser-plasma interactions
Ratul Sabui, S. V. Rahul, Angana Mondal +4
We report the generation of MeV temperature electrons using sub-terawatt laser systems with a liquid methanol jet as a target. Remarkably, even at laser intensities of 1016W/cm2, l…
Explosions of water clusters in intense laser fields
V. Kumarappan, M. Krishnamurthy, D. Mathur
Energetic, highly-charged oxygen ions, (), are copiously produced upon laser field-induced disassembly of highly-charged water clusters, and …