Method and Results of the Experiment. High-speed electrons from a Linac bombarded a lead target

High-speed electrons from a Linac bombarded a lead target. The Linac’s working energy levels were set up at 6 MeV, 8MeV, 10MeV, 12MeV and 15MeV. The current strength of electrons was 1.26A with the impulse width of 5[ns] and frequency 5[Hz]. The electrons bombarded the target for 120[s], So, each bombardment’s cumulative time was only [s]. The cumulative electric charges receiveed by the target was [Coulomb]. Since 1[Coulomb] electrons, so the target received electrons. Since 1 [MeV] [Joule], so each MeV of the electrons is equivalent to [Joule]. The target’s mass is 70[g]. Since the lead’s specific heat is [J/g C], so [Joule] is needed for the lead target’s temperature to increase C. The temperature is measured by a thermoelectric couple. The experiment’s equipment and the measured values of the lead target’s temperature increase are shown below:

Linac’s working energy [MeV]
Measured temperature increase [ C]	0.25	0.30	0.32	0.34	0.35

Table 4

The target’s temperature varies very little, although the Linac’s working energy level changes widely.