Apparatus of Franck-Hertz Experiment - Mercury Tube

System composition

Frank Hertz (mercury tube) tester + temperature control adapter + mercury tube heating furnace + connecting wire

Experiment contents

1. Understand the design idea and method of Frank Hertz (mercury tube) experiment instrument;

2. The first excited potential of mercury atom was measured to understand the existence of atomic energy level;

3. The effects of filament voltage, furnace temperature and reverse rejection voltage on the experimental phenomena were studied;

4. The high energy level excited state of mercury atom is measured to deepen the understanding of atomic energy level;

5. The ionization potential of mercury atom was measured;

Technical indicators

1. Filament voltage VF: 0 ~ 6.5V, continuously adjustable;

2. The rejection field voltage vg2a: 0 ~ 15V, continuously adjustable;

3. The voltage between the first gate and cathode vg1k: 0 ~ 12V, continuously adjustable;

4. The voltage between the second gate and the cathode vg2k: 0 ~ 65V;

5. Micro current measurement range: 0 ~ 1000na, automatic shift, accuracy ± 1%;

6. Four groups of voltage and measured current of Frank Hertz (mercury tube) are displayed on the 7-inch TFT LCD touch screen at the same time. Automatic measurement and manual measurement can be directly touched and switched. The display resolution is 800 * 480;

7. FH mercury tube: overall dimension cylinder diameter 18mm height: 50mm

8. The heating furnace adopts PTC heat conduction heating mode and PID intelligent temperature controller, with fast temperature rise and fall speed, accurate temperature control (± 1) and working power of 300W

9. Input power: 220 V, 50 Hz;

10. Interface configuration, USB interface synchronous data transmission text file (txt) format;

11. Signal output (BNC) and synchronous output (BNC) can be connected with external oscilloscope to display characteristic curve;

Product features

Frank Hertz (mercury tube) experimental instrument enables students to obtain more abundant information about atomic energy levels, so that students can learn more experimental skills.

Experiments

1. Manual measurement: continuously turn the coding knob to increase the acceleration voltage, record the change of plate electrode current and make the change curve;

2. Automatic measurement: the system increases the acceleration voltage step by step, and measures and records the plate electrode current; in the automatic measurement mode, the system outputs the measurement data periodically for the LCD to observe the measurement curve;

3. Accurate temperature control can measure the first excitation potential, and more than 12 peaks can be observed or described;

4. The 63p1 63p261p1 energy levels of mercury atom can be measured successfully under suitable working mode;

5. Under suitable working mode, the ionization potential of mercury atom can be measured successfully;

6. Synchronous data transfer text file (txt) format can be used for data analysis by computer software.

Self prepared part :oscilloscope