Abstract |
Termoacoustic Detection of the
Microwave Pulses of Nanosecond Duration
V.A.Vdovin (Institute of Radio
Engineering and Electronics, Russian Academy of Sciences, Moscow, Russia);
V.G.Andreev (Department of Acoustics, Faculty of Physics, Moscow State
Univerisity, Moscow, Russia); A.A.Karabutov (Interanational Laser Center, Moscow
State Univerisity, Moscow, Russia)
e-mail:
vdv@mail.cplire.ru
Basic
principles of a thermo-acoustic method developed for the detection of powerful
microwave pulses of nanosecond duration are discussed. A proposed method is
based on the registration of acoustic pulse profile originated from the thermal
expansion of the volume where microwave energy was absorbed. The amplitude of
excited acoustic transient is proportional to absorbed microwave energy and its
temporal profile resembles one of a microwave pulse when certain conditions are
satisfied. The optimal regimes of microwave pulse energy detection and
sensitivity of acoustic transient registration with piezo-transducer are
discussed. It was demonstrated that profile of a microwave pulse could be
detected with temporal resolution of 1 . 3 nanosecond.
Section
: 9