SU1221564A1 - Arrangement for exciting electronic spin echo - Google Patents

Abstract

The invention relates to radio engineering and experimental physics and can be used in the development of radio frequency EPR research methods, as well as in devices for processing and converting signals. The purpose of the invention is to increase the sensitivity of the device. This goal is achieved by the fact that in an electron spin echo excitation device, the resonator is made in the form of a square segment of a symmetric strip line acting as a quadrature bridge. 3 il. you at at eft 4

Description

I1

The invention relates to radio engineering and experimental physics and can be used in radio-spectroscopy to develop radio-frequency methods for studying electron paramagnetic resonance, one of which is the spin echo method used to process and convert signals in various devices.

The purpose of the invention is to increase the sensitivity of the device.

Figure 1 presents the block diagram of the device; Fig. 2 illustrates a cavity resonator with a quadrature bridge; FIG. 3 shows the use of a strip line as a quad bridge.

The device (Fig.) Contains series-connected radio pulse generator 1, quadrature bridge 2, a resonator 3 placed in the gap of the permanent magnet 4, and the quadrature bridge 2 is connected to the output of the radio pulse generator 1, the second and third shoulders to the input of the resonator 3 and the fourth shoulder of the quadrature bridge is the output of the device,

Figure 2 shows a variant of the resonator design. 3 with a quadrature bridge 2 connected to it. A waveguide slotted bridge 5 is used as quadrature bridge 2, the first arm 6 of which is connected to the output of the radio pulse generator 1, the second .7 and the third 8 shoulders are connected to the input of the resonator 3, and the quadrant, the shoulder 9 of the slot-hole bridge 5, is the output of the device. In the center of the resonator 3 is placed a sample of

Output

2

magnetic substance 10. The resonator 3 has a communication hole 11 and 12 in the walls. FIG. 3 shows a variant of the design of a resonator 3 with a plug

square quadrature bridge 2, in which a square strip bridge 13 is used as a quadrature bridge 2, the first 14 arms of which are connected to the output of the radio pulse generator 1, the second 15 and the third 16 shoulders to the input of the resonator 3, made in the form of a square piece symmetrical strip line. The connection between the shoulders 15 and 16 of the strip bridge 13 and the strip line segment is carried out through capacitive gaps 17 and 18. Inside the resonator there is a sample 19 of a paramagnetic substance. Fourth 20

the shoulder of the strip bridge 13 is the output of the device.

Claims (1)

Invention Formula  An electron spin echo excitation device containing a reflective resonator filled with a paramagnetic substance and an E1 permanent non-uniform magnetic field, and a generator of radio pulses, characterized in that in order to increase the sensitivity, a quadrature bridge is inserted into it, and the resonator is made in the form of a square segment symmetrical strip line, with the quadrature bridge connected by the first shoulder to the generator of radio pulses, the second and third adjacent shoulders to the input of the resonator, and the fourth shoulder, The first one is device output,. From generator 1 l (Wi} W Output Fib.2 ; - Generate the rotor / - Vmodu - 20 i (m) Hr (le0f)