Cerenkov light

The jitter between the laser pulse and the electron pulse was estimated from the measurement using a streak camera (C1370, Hamamatsu Photonics Co. Ltd.), because the jitter is one of important factors that decide the time resolution of the pulse radiolysis. The jitter was several picoseconds. To avoid effects of the jitter on the time resolution, a jitter compensation system was designed [74]. The time interval between the electron pulse (Cerenkov light) and the laser pulse was measured by the streak camera at every shot. The Cerenkov radiation was induced by the electron pulse in air at the end of the beam line. The laser pulse was separated from the analyzing light by a half mirror. The precious time interval could be... 

Michael BD, Harrop HA, Held KD (1981a) Photoreactivation of Escherichia coli after exposure to ionizing radiation The role of U.V. damage by concomitant Cerenkov light. Int J Radiat Biol 39 577-583... 

Influence of chemical and physical factors. Int J Radiat Biol 35 473-476 Redpath JL, Zabilansky E, Morgan T, Ward JF (1981) Cerenkov light and the production of photore-activatable damage in X-irradiated E. coli. Int J Radiat Biol 39 569-575 Reich KA, Marshall LE, Graham DR, Sigman DS (1981) Cleavage of DNA by 1,10-phenanthroline-cop-per ion complex. Superoxide mediates the reaction dependent on NADEI and hydrogen peroxide. J Am Chem Soc 103 3582-3584... 

Fig. 6. Scheme of the laser-driven RF electron accelerator of pulse radiolysis facility ELYSE. IP ion vacuum pump, CPC cathode preparation chamber, W vacuum valve, SOL solenoid, D dipole, TRl and 2 triplets, Q quadrupole, WCM wall current monitor, PC Faraday cup, T translator for Cerenkov light emitter and visualization screen LME laser entrance mirror, LMEx laser exit mirror, VC virtual cathode FIS horizontal slit, VS vertical slit. (Reproduced with permission from Ref 28.)... 

On the Osaka University thermionic cathode L-band linac, a time resolution of two picoseconds was achieved using magnetic pulse compression and time jitter compensation systems (Fig. 13). The time jitter between the Cerenkov light from the electron beam and the laser pulse was measured shot-by-shot with a femtosecond streak camera to accurately determine the relative time of each measurement in the kinetic trace. In this way, the time jitter that would otherwise degrade the time resolution was corrected, and the remaining factor dominating the rise time was the electron-light velocity difference over the 2-mm sample depth. 

Fig. 17. Kinetic profile of hydrated electron at 700 nm recorded with the streak camera after subtraction of the Cerenkov light (average of 400 pulses).

Improvements in time resolution in the stroboscopic method were achieved at the University of Tokyo by use of a twin linac system in which one aceelerator delivers the electron pulse to the sample and the other generates the Cerenkov light pulse used as the analyzing light [151]. Both linacs are driven by the same microwave source and delay between the electron pulse and the light pulse is achieved by phase shifters [151a]. The result is that the time interval between these two pulses is less than 3 ps. 

Indetermination on muon energy is large, indeed, since the energy loss in Cerenkov light is very small and since only a fraction of the muon track is sampled. 

Figure 3. Spectral response of photometer system. Curve A is the emission spectrum of Cerenkov light from irradiated quartz. Curves By C, and D show the photometer response using Bausch and Lomh gratings. Curve B, ultra-violet grating type 33-86-01, no filter. Curve C, visible grating type 33-86-02, no filter. Curve D, visible grating type 33-86-02, using the Chance filters...

Cosmic ray pcu-ticles produce Cerenkov light in the atmosphere and produce fluorescent light through the excitation of atmospheric molecules,... 

Background cosmic ray peuticles will produce Cerenkov light in transparent materied with a photon yield between wavelengths and Xj... 

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