Frozen solution sample preparation device applicable to ultra-high vacuum system
Disclosed is a frozen solution sample preparation device applicable to an ultra-high vacuum system. The frozen solution sample preparation device includes: a sample stage, a compressible linear shift, a sample transfer chamber, a gate valve, a solution vessel and a vacuum pump; where the sample stage includes a cooling system and a sample preparation system; an interior of the compressible linear shift has a hollowed structure; a top end of the sample transfer chamber is hermetically connected to a bottom end of the compressible linear shift, the sample transfer chamber is connected to the interior of the compressible linear shift to form a connected chamber, and the connected chamber is connected to the vacuum pump; and the solution vessel is connected to a bottom end of the sample transfer chamber through the gate valve.
1 . A frozen solution sample preparation device applicable to an ultra-high vacuum system, comprising: a sample stage, a compressible linear shift, a sample transfer chamber, a gate valve, a solution vessel and a vacuum pump; wherein
the sample stage comprises a cooling system and a sample preparation system, and the sample preparation system is fixed at a bottom end of the cooling system;
an interior of the compressible linear shift has a hollowed structure, a lower portion of the sample stage is arranged in the compressible linear shift, and a top end of the compressible linear shift is hermetically fixed to the sample stage;
a top end of the sample transfer chamber is hermetically connected to a bottom end of the compressible linear shift, the sample transfer chamber is connected to the interior of the compressible linear shift to form a connected chamber, and the connected chamber is connected to the vacuum pump; and
the solution vessel is connected to a bottom end of the sample transfer chamber through the gate valve.
2 . The frozen solution sample preparation device according to claim 1 , wherein the cooling system comprises: a cryogenic liquid inlet, a cryogenic liquid outlet and a cryogenic dewar; and
the cryogenic dewar has an annular cylindrical tank structure with a cavity in a middle, and each of bottom ends of the cryogenic liquid inlet and the cryogenic liquid outlet is connected to the cryogenic dewar.
3 . The frozen solution sample preparation device according to claim 2 , wherein an feedthrough pins is arranged at a top of the sample stage, a heater is arranged in the cavity in the middle of the cryogenic dewar, and the heater is connected to the feedthrough pins through a wire.
4 . The frozen solution sample preparation device according to claim 3 , wherein an upper portion of the sample stage is provided with a flange plate, each of top ends of the cryogenic liquid inlet and the cryogenic liquid outlet upwardly penetrates out of a via hole reserved in the flange plate, a bottom end of the feedthrough pins downwards penetrates a via hole reserved in the flange plate to be connected to a terminal on the heater, and a portion, below the flange plate, of the sample stage is arranged in the interior of the compressible linear shift and is connected to the compressible linear shift through the flange plate.
5 . The frozen solution sample preparation device according to claim 1 , wherein the top end of the compressible linear shift is hermetically fixed to the sample stage through the port aligner.
6 . The frozen solution sample preparation device according to claim 2 , wherein the sample preparation system comprises a sample socket and a sample holder;
the sample socket is fixed at a bottom end of the cryogenic dewar, and a bottom of the sample socket is provided with a reed for clamping the sample holder; and
a sample substrate for collecting a solution sample is fixed on a lower surface of the sample holder.
7 . The frozen solution sample preparation device according to claim 1 , wherein the sample transfer chamber is a cube chamber, the top end of the sample transfer chamber is provided with an upper flange for being connected to the compressible linear shift, and the bottom end of the sample transfer chamber is provided with a lower flange for being connected to the gate valve; a front end of the sample transfer chamber is provided with a sample transfer device connector that outwards stretches out and is connected to and accommodates a sample transfer device, and a spring clip end of the sample transfer chamber is provided with a main chamber flange for being connected to a main characterization chamber; and a left end of the sample transfer chamber is provided with a standby flange, and a right end of the sample transfer chamber is provided with an observation window.
8 . The frozen solution sample preparation device according to claim 1 , further comprising a lifting assembly, wherein the lifting assembly is connected to the compressible linear shift.
9 . The frozen solution sample preparation device according to claim 8 , wherein the lifting assembly comprises a screw, a lifting part and a supporting part;
the lifting part is fixed at an upper portion of the compressible linear shift, and the supporting part is fixed at a lower portion of the compressible linear shift; and
a bottom end of the threaded rod is rotatably connected to the supporting part, and a top end of the threaded rod upwards penetrates a threaded hole in the lifting part.
10 . The frozen solution sample preparation device according to claim 9 , wherein the lifting assembly further comprises a ruler, a bottom end of the ruler is fixed on the supporting part, and a top end of the ruler upwardly extends out of a via hole reserved in the lifting part.