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Figure 2
(a) Top view of the cryogenic pot in the vacuum chamber of the KOTOBUKI-1 diffraction apparatus. A specimen disk (1) carrying a single biological cell is fixed to a specimen holder (2). The holder is mounted on the cryogenic pot (3), which is connected to a goniometer. Liquid nitro­gen is supplied to the pot through a high-impedance cupronickel capillary (4). The cyan-colored arrows indicate the flow direction of liquid nitro­gen in the capillary with an inner diameter of 0.75 mm. The magenta-colored arrows show the direction of nitro­gen gas flow in the flexible exhaust pipe (5) from the pot to the scroll pump. The temperatures of the pot, the capillary and the pipe are monitored by thermocouples (6). The capillary (4) and exhaust pipe (5) are circularly arranged on a frame made of polychloro­tri­fluoro­ethyl­ene (7). The X-ray beam arrives at the specimen position through a silicon frame (8) fixed to a motorized device (9) for positioning. (b) Specimen holder composed of a main body (10) and a plate to fix the specimen disk (11). A pair of holes (12) for accepting a fork at the tip of a transfer rod is machined in the lower part of the main body. (c) A hanger frame (13) of a carrier for the delivery of the specimen holder from a liquid-nitro­gen bath to the load-lock chamber of the diffraction apparatus. (d) Snapshot of the transfer rod (14) bringing the specimen holder from the load-lock chamber to the cryogenic pot. The transfer rod has a pair of claws and fork at the tip (15).

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