First attempt at activating Indium
Posted: Wed Jan 01, 2020 4:32 pm
The past few days I’ve been working on indium activation with my Fusor. To do so, I assembled the following:
6x6” paraffin moderator cut in half
1.5x1.5” sq indium foil
LND7311 pancake at 900v
Nucleus 500 digital scaler
The indium foil was placed between the two 3” paraffin halves and placed 8cm from the Fusor. This would place the indium approx 16cm away as it was in the center of the two paraffin halves (see pic).
-Pre activation background-
The LND7311 registered 359 normal background counts in 10 minutes which equates to 35.9cpm. I conducted the same background assessment two other times which resulted in a ~5cpm difference.
-The run-
The Fusor run consisted of:
5 minutes
43kV
3mA
40mTorr D2 pressure
3.45e5 isotropic n/s
6.91e5 fusions/s
After the run was completed and with the fusor input voltage switched off, the LND7311 pancake registered the following numbers:
Timed 1 minute counts:
1. 103cpm
2. 69cpm
3. 64cpm
4. 60cpm
5. 56cpm
It seemed to stagnate around 50-60cpm but slowly decayed to 40cpm after 1 hour.
Here’s a YT video of the first 2 minutes.
https://youtu.be/3J3jUPI_FPw
Any comments, criticisms, etc welcomed.
Mark Rowley
6x6” paraffin moderator cut in half
1.5x1.5” sq indium foil
LND7311 pancake at 900v
Nucleus 500 digital scaler
The indium foil was placed between the two 3” paraffin halves and placed 8cm from the Fusor. This would place the indium approx 16cm away as it was in the center of the two paraffin halves (see pic).
-Pre activation background-
The LND7311 registered 359 normal background counts in 10 minutes which equates to 35.9cpm. I conducted the same background assessment two other times which resulted in a ~5cpm difference.
-The run-
The Fusor run consisted of:
5 minutes
43kV
3mA
40mTorr D2 pressure
3.45e5 isotropic n/s
6.91e5 fusions/s
After the run was completed and with the fusor input voltage switched off, the LND7311 pancake registered the following numbers:
Timed 1 minute counts:
1. 103cpm
2. 69cpm
3. 64cpm
4. 60cpm
5. 56cpm
It seemed to stagnate around 50-60cpm but slowly decayed to 40cpm after 1 hour.
Here’s a YT video of the first 2 minutes.
https://youtu.be/3J3jUPI_FPw
Any comments, criticisms, etc welcomed.
Mark Rowley