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I am working on physics research, and I am using the DC High voltage supplier ~30KV from the wall AC power.

I am not sure what is happening, but when I apply more than 3kV it start to interfere with other device such as computer monitor is blanking. Not just monitor, I think it make all other electronic device to be blinking, such as some of our feedback control and power supplier.

I don't really have good knowledge about the electronics. What can be possible issue? I am afraid too much voltage is going to ground and that ground is affecting other device's ground? or does it create the magnetic field, so do I need some shield around it?


For more detail, I am applying the power to the Rubidum85 atom contained cell, and apply at the two small plate distanced 2.5mm Which will create the electric field in order to see the energy level shift on atom. enter image description here


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    \$\begingroup\$ What are you doing with the 30KV? \$\endgroup\$ – JRE Oct 27 '16 at 15:39
  • \$\begingroup\$ @JRE I updated! \$\endgroup\$ – Saesun Kim Oct 27 '16 at 15:45
  • \$\begingroup\$ Is that 30KV DC or AC or pulsed in some way? \$\endgroup\$ – JRE Oct 27 '16 at 15:48
  • \$\begingroup\$ How far apart are the plates? Are they in air or in vacuum or some other gas? \$\endgroup\$ – JRE Oct 27 '16 at 15:51
  • \$\begingroup\$ @JRE I editted, it is DC and also it is rubidum 85 with 2mm distance \$\endgroup\$ – Saesun Kim Oct 27 '16 at 15:52
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There is the possibly that such a high voltage is creating a signal strong enough that disrupts other instruments or electronics.

I doubt the ground is affecting the other instruments, as that should be neutral. Try adding higher resistors along the 1K range to manage the power supply. At such a high voltage, there is more of possibility of interference occurring, because not enough of the signal is being filtered.

Here is a link explaining Electromagnetic Interference occurring from high voltage:

http://home.zcu.cz/~tesarova/IP/Proceedings/Proc_2010/Files/025%20IP2010%20Kysela.pdf

In more detail you could be dealing with Corona,

"Corona discharges are a source of radio noise. Spectral components ranging from a few kHz to 10 MHz. In this frequency band, the disturbance spreads leadership. Leadership is an effective radiator, since the wavelength is due to the large size wires."

From the posted link. A discharge may be creating signal nose.

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