High voltage (2.5 KV) H-bridge, low current, low frecuency

Hi:

I need to alter the polarity of a high voltage source connected to a load at around 1 hz.

I have a high voltage (2.5 kv) power supply that has positive and negative outputs that can be floated to any ground reference. I basically need a high voltage H-bridge. Current is minimal, in the order of microamperes.Space is a very important aspect in the design.

Do you have any ideas on how can this be achieved? (High voltage transistors, mosfets etc)

Thanks

Fernando

Vacuum tubes.

single diodes:
Vishay/General Semiconductor
GP02-40-E3/54 4kv 250mA
GP02-30-E3/54 3kv 250mA

There is a way of using three 1kv diodes in series. (you will need to add 10Mega ohm resistors across each diode) (high voltage resistors)

Bridge:
IXYS
UGB3132AD 4800V 1.3A
UGD6123AG 7kv 1.8A