(41) This high production shop is owned and operated by brothers Chiel and Wil. This picture shows the four ovens in the shop; three pumping ovens, one annealing oven and one standard bombarding station. The lids to the ovens are lowered by a pulley system mounted on I-beams above the oven. The wood mounted on the sides is to protect the pumping arm that travels around the perimeter of the oven. [ View Picture ]
(43) All heating coils for the oven are located in the lid of the oven. [ View Picture ]
(44) Here, the manifold pumping arm is visible. The tubulation from the unit comes out of the small hole in the side of the oven and attaches to the tubulations that can be seen here. The mercury trap is also placed in this part of the tubulation so that it is outside of the oven. The oven has roughly 60 'portholes' for pumping on three sides of the oven. On the fourth side is the manifold. Each side of the oven is fitted with plug-in air, gas and oxygen fittings for a hand torch. This greatly simplifies sealing on the units. [ View Picture ]
(45) A close-up of inside the oven. The units are placed on blocks both to keep them from touching each other and to raise the electrodes so that the induction coil can fit around them. [ View Picture ]
(45A) A blow up of a detail from the above photo. [View Picture ]
(Note: how the double-backed tubulation can fit through the porthole. - kg)
(46) The induction coil is mounted on a gun shaped unit controlled by a trigger. The coil is passed back and forth over the electrode until it is consistently 'cherried'. As each electrode is converted, the leads are twisted up so that the operator knows which has been completed. [ View Picture ]
(47) The manifold for the oven pumping system. Each manifold is fitted with a turbomolecular pump which can be seen in the center. [ View Picture ]
(48) The aging screen at Neon van der Ven. This picture shows the mirror effect on the back of the units. It can most clearly be seen on the back of the blue cat. [ View Picture ]