More Parts And Funding Achieved!

August 5, 2014 at 3:39 pm

Great news – I received a donation last Friday which was enough to fulfil the funding goal of €10,000!  This is brilliant news as it means the Fusor build should be relatively smooth from here on.  Thanks again to every single person who has made this possible – all those who donated financially,  those who have donated equipment, those who helped with the campaign and everybody at fusor.net

In the past week or so since my last post, more parts have also arrived.  The regulator for admitting deuterium from the lecture bottle that it’s supplied in has arrived as did another leak valve I ordered for admitting deuterium.  The Penning gauge (for vacuum measurement) I ordered also came – from South Korea!  You can expect these updates with equipment to continue being posted about once every 1-2 weeks as parts I buy arrive.

I’m also looking for a KF10 to CF 2.75″ (DN40) adaptor piece.  If anybody can find on of these, please email me.

Tom

Regulator:

The regulator is a Victor VTS452D for hydrogen, methane and natural gas, bought from jollyg00d on Ebay.  Although the regulator is meant for use with hydrogen and I’ll be using deuterium, it is the most appropriate one available apart from a purpose-built deuterium regulator, which would be exceedingly expensive.  It’s quite a hunk of metal, it weighs almost 1kg!

Hydrogen deuterium regulator gas pressure fusor fuel tom mccarthy

Hydrogen regulator to be used for deuterium admittance.

 

Hydrogen deuterium regulator gas pressure fusor fuel tom mccarthy

Side view of the hydrogen regulator.

 

Leak-valve:

The leak valve is a Granville-Philips series 203 variable leak.  The valve was bought from surplus2012 on Ebay.  It is suitable for use in vacuum connected system and can provide a suitably low flow rate for use in admitting deuterium to the Fusor.  When I received the valve, the knob used to control flow rate was not changing the meter.  After checking the meter itself, I found that the knob was getting jammed after less than 1 turn.  Luckily, all that was needed to fix the problem was a bit of dismantling and a few sprays of WD-40.  The valve now seems to be in full working order.

Leak valve granville philips variable needle valve fusor deuterium tom mccarthy

View of other connection on leak valve.

 

Leak valve granville philips variable needle valve fusor deuterium tom mccarthy

View of one of the connections on the leak valve.

 

Leak valve granville philips variable needle valve fusor deuterium tom mccarthy

Granville-Philips leak valve.

 

Gauge:

The pressure gauge is an Edwards 503 controller with Edwards PRL10K Pirani sensor, bought from usedparts-korea on Ebay.  The gauge and sensor have a range from atmosphere to 1×10-4 mbar which will be perfect for Fusor use.  The gauge has a NW10 (kwif-flange) connection, so I’ll have to get an adaptor for NW10 to whatever conflat port I add it to on the chamber, most likely 2.75″ – DN40.  If anybody can find me one of those, please email me at tommccarthyprojects@gmail.com

Penning gauge thermocouple sensor vacuum pressure fusor tom mccarthy

Back of the Pirani gauge, 7-pin connection for sensor on bottom-left.

 

Penning gauge pressure vacuum fusor tom mccarthy sensor head thermocouple Edwards

Pirani gauge sensor.

 

Penning gauge pressure vacuum fusor tom mccarthy

Controller gauge display.