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linac test 30_01_23
00002: power supply
| Step | Step description | Expected result | Result |
| Precondition | System is Off | ||
| Switch On the system | turn on the power supply (P1) | Get continuous power (6 V) | positive |
| Switch Off the system | turn Off the power supply (P1) | Continuous power stops | positive |
| Postcondition | System is Off |
00003: Get electrons
| Step | Step description | Expected Result | Result |
| Precondition | System is Off | ||
| Switch On the pump | turn On the pump | 95% vacuum | positive |
| Switch on the system | Turn on the power supply | Get continuous power (6 V) | positive |
| Burning the Tungsten ( or use a electron gun) | Burn the Tungsten by supplying it with 6 V power |
Get electrons around the Tungsten ( the lamp will light) |
positive (the lamp turned on) |
| Switch Off the power supply | turn Off the power supply |
the lamp will turn Off |
positive |
| Switch Off the pump | turn Off the pump |
the pump stops pulling out the air |
positive |
| Postcondition | System is Off |
00004:High voltage
| Step | Step description | Expected Result | Result |
| Precondition | System is Off | ||
| Switch On the system | Turn On the HV | Get continuous power ( between 5 Kv and 60 Kv ) | positive |
| Switch Off the system | Turn Off the HV | Continuous power stops | positive |
| Postcondition | System is Off |
00005: Acceleration of electrons
| Step | Step description | Expected Result | Result |
| Precondition | System is Off | ||
| Switch On the pump | turn On the pump | 95% vacuum | positive |
| Switch On the power supply | turn On the power supply | Get continuous power (6 V) | positive |
| Switch on the High voltage | Turn on the HV power supply | Get continuous power ( between 5 Kv and 60 Kv ) | positive |
| electrons acceleration | Connecting the high voltage to the anode and the cathode (while controlling the change of force until we see the passage of electrons and their acceleration) | Electrons leaving the anode accelerate towards the cathode and collide with it | positive (light appears between the anode and the cathode) |
| Switch Off the HV | Turn off The HV power supply | Electrons acceleration Stop | positive |
| Switch Off the power supply | turn Off the power supply | the lamp will turn Off | positive |
| Switch Off the pump | turn Off the pump | the pump stops pulling out the air | positive |
| Postcondition | System is Off |
Analysis of the test results:
In this test, we used a lamp with filaments of good thickness (~ 2 mm ), and we attached tungsten to these filaments.
Then we supplied the lamp with a power of 6 V, and it lit up, which indicates that we have obtained electrons.
After this stage, we turned on the high voltage, and we saw a violet light path, which indicates that electrons are moving quickly between
the anode and the cathode.
But the problem was that the light path was tortuous and not straight.
Before turning on the high voltage:
At the first moment of turning on the high voltage:
A few moments and the electronic path appeared:
high voltage ~ 60 KV:
High voltage ~ 30-40 KV :
What we have to do:
-We will move the cathode a little back, thus increasing the distance between the anode and the cathode, and see what changes.
-We will conduct the test while keeping the pump running.