Revision as of 11:36, 3 January 2012

STILL

Here are some technical details about the still.

Connection: BOX II X3:(1-4).
R_Still= 1.13 k ${\Omega }$ , new heater installed November 2011.
I_Still= 3-5 mA, depending on required cooling power.
The still heater is mounted on the lower side of the still. The resistor is shielded by a gold plated copper housing. The wires are shielded by a textile tube and lead from the resistor via a fed-through at the still-flange to the 1K-pot.

Picture of former still heater.

CuNi-wire: d=??um, r=200 ${\Omega }$ /m, R_Still= 1.13{{O}
The heater is build up by N=100 twists of the wire wrapped around the former copper heater-body. GE-varnish was used to fix the wire and each layer. To protect the heating wires cigarette paper was added between each layer and at the end. Finally the we used dental floss wrapped around the cigarette paper as top layer to fix an shield the wire.
Four copper wires lead from the solder connection at the upper side of the still to resistor beneath it.

Picture of former still heater.

Resistance of still heater : R_Still=880 ${\Omega }$ . Based on the original SHE-manual it was supposed to be ~1k ${\Omega }$ ?

! removed November 2011, since it didn't work anymore. One resistance-foil was broken.

@@ Line 24: / Line 24: @@
 === New Still Heater ===
-*
+[[Image:Still_heater_new.jpg|right|thumb|120px|Picture of former still heater.]]
+* CuNi-wire: d=??um, r=200{{O}}/m, R<sub>Still</sub>= 1.13{{O}
+* The heater is build up by N=100 twists of the wire wrapped around the former copper heater-body. GE-varnish was used to fix the wire and each layer. To protect the heating wires cigarette paper was added between each layer and at the end. Finally the we used dental floss wrapped around the cigarette paper as top layer to fix an shield the wire.
+* Four copper wires lead from the solder connection at the upper side of the still to resistor beneath it.
 {{clear}}