Abstract
In accelerators working at accelerating frequencies of several 100 MHz the bunch length is in the order of several hundred picoseconds. For obtaining good measurements the time resolution of the measuring apparatus should be 10 ps. With convenient electronic components such a high time resolution cannot be obtained. In this paper a method is described for measuring the bunch length optically by measuring the time structure of the light emitted by relativistic particles (synchrotron or Cerenkov radiation). The heart of the system is a wideband Nd3+-Glass Laser emitting infrared light at 1.06 ?m. With a special technique, the so-called mode-locking, the laser is forced to emit high-intensity optical pulses of several GW peak power and a pulse-length of about 5 ps. These pulses enter a cell filled with a Kerr medium, e.g. CS2, and induce birefringence. Since the relaxation time of CS2 is small, the bire-fringent zone travels with c/n through the Kerr medium. Combinated with two polarizers the system works like a camera with a slit-shutter traveling at the velocity of light. By photographing a total time resolution of 10 ps is obtained.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
