Standard Laboratory Vacuum System Stations - Revision history

Pbarber: /* Maintenance */

2026-02-11T16:04:17Z

Maintenance

← Older revision		Revision as of 12:04, 11 February 2026
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	Students are not expected to perform maintenance on these systems, however an understanding will help students know when to alert staff to maintenance issues.		Students are not expected to perform maintenance on these systems, however an understanding will help students know when to alert staff to maintenance issues.

	Maintenance actions involving cryopumps almost always ~~involve~~ thermal cycling and therefore can involve prolonged periods of time. It is not uncommon to lose the better part of a day of data collection due to a cryopump issue.		Maintenance actions involving cryopumps almost always require thermal cycling and therefore can involve prolonged periods of time. It is not uncommon to lose the better part of a day of data collection due to a cryopump issue.

	{{ Warning \| Since the addition of the Tritium Source, Tandem Accelerator Cryopump maintenance procedures have been altered to allow for the possibility of tritium accumulation in the pump. Maintenance should only be performed by qualified personnel in consultation with the Tritium Source team. As of this writing, the procedures are in flux and thus can not be delineated here. The following information applies in general to a cryopump w/o the possibility of contamination and remain here now for educational purposes only. }}		{{ Warning \| Since the addition of the Tritium Source, Tandem Accelerator Cryopump maintenance procedures have been altered to allow for the possibility of tritium accumulation in the pump. Maintenance should only be performed by qualified personnel in consultation with the Tritium Source team. As of this writing, the procedures are in flux and thus can not be delineated here. The following information applies in general to a cryopump w/o the possibility of contamination and remain here now for educational purposes only. }}

Pbarber: /* Turbo-Pump Based Stations */

2026-02-11T15:55:00Z

Turbo-Pump Based Stations

← Older revision		Revision as of 11:55, 11 February 2026
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	=== Turbo-Pump Based Stations ===		=== Turbo-Pump Based Stations ===
	The Turbo-Pump Based Vacuum Station is a system used to produce high vacuum ( 10<sup>-6</sup> < X < 10<sup>-9</sup> Torr ) in beamlines and experimental chambers through out the lab. Turbo pump~~, or more exactingly turbomolecular pump,~~ systems are ''throughput'' pumping systems, which means that the gases that are removed from the evacuated space are continuously discharged into the atmosphere. Turbo pumps cannot discharge to atmospheric pressure and require a roughing pump to interface between the turbo's discharge port and atmosphere. In our lab, this roughing pump is typically an oil-sealed, rotary-vane vacuum pump but may sometimes be an oil-free, dry scroll pump.		The Turbo-Pump Based Vacuum Station is a system used to produce high vacuum ( 10<sup>-6</sup> < X < 10<sup>-9</sup> Torr ) in beamlines and experimental chambers through out the lab. Turbo (short for Turbomolecular) pump systems are ''throughput'' pumping systems, which means that the gases that are removed from the evacuated space are continuously discharged into the atmosphere. Turbo pumps cannot discharge to atmospheric pressure and require a roughing pump to interface between the turbo's discharge port and atmosphere. In our lab, this roughing pump is typically an oil-sealed, rotary-vane vacuum pump but may sometimes be an oil-free, dry scroll pump.

	The standard turbo pump station consists of the following components:		The standard turbo pump station consists of the following components:
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	All of the turbo pumps in operation in our lab use one of two bearing types: (1) static or dynamic magnetic bearings, or (2) permanently lubricated ceramic ball bearings. In both of these cases, the pumps are run until failure. Some of our turbos have a hybrid bearing technology where one bearing is magnetic, but the other is ceramic ball. The Re-Buncher turbo does have a battery that must be replaced periodically. Cooling fan operation must be maintained when in operation unless approved by staff. The oil-lubricated, rotary-vane roughing pumps require oil changes, shaft seal changes, and occasional rebuilds. Dry-scroll roughing pumps require tip-seal replacements periodically.		All of the turbo pumps in operation in our lab use one of two bearing types: (1) static or dynamic magnetic bearings, or (2) permanently lubricated ceramic ball bearings. In both of these cases, the pumps are run until failure. Some of our turbos have a hybrid bearing technology where one bearing is magnetic, but the other is ceramic ball. The Re-Buncher turbo does have a battery that must be replaced periodically. Cooling fan operation must be maintained when in operation unless approved by staff. The oil-lubricated, rotary-vane roughing pumps require oil changes, shaft seal changes, and occasional rebuilds. Dry-scroll roughing pumps require tip-seal replacements periodically.




	=== Cryopump Based Stations ===		=== Cryopump Based Stations ===

Pbarber: /* Introduction */

2026-02-11T15:53:22Z

Introduction

← Older revision		Revision as of 11:53, 11 February 2026
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	== Standard Laboratory Vacuum System Stations ==		== Standard Laboratory Vacuum System Stations ==
	=== Introduction ===		=== Introduction ===
	In order to achieve high vacuum (nominally ~ 1 x 10E-6 Torr) it is necessary to combine various vacuum technology components into a system, sometimes colloquially referred to as a "stack." Throughout our lab, there are vacuum stations that are used to achieve high vacuum in different sections of the accelerator. Typically, anywhere the beamlines or accelerator can be separated by isolation valves, a station exists between those valves. It is undesirable to have a "dead section" of beamline - a section that is isolated by valves but without a vacuum station. This page explains the basic stacks or systems in ~~used~~ at each station throughout our lab.		In order to achieve high vacuum (nominally ~ 1 x 10E-6 Torr) it is necessary to combine various vacuum technology components into a system, sometimes colloquially referred to as a "stack." Throughout our lab, there are vacuum stations that are used to achieve high vacuum in different sections of the accelerator. Typically, anywhere the beamlines or accelerator can be separated by isolation valves, a station exists between those valves. It is undesirable to have a "dead section" of beamline - a section that is isolated by valves but without a vacuum station. This page explains the basic stacks or systems in use at each station throughout our lab.

	=== Turbo-Pump Based Stations ===		=== Turbo-Pump Based Stations ===
	The Turbo-Pump Based Vacuum Station is a system used to produce high vacuum ( 10<sup>-6</sup> < X < 10<sup>-9</sup> Torr ) in beamlines and experimental chambers through out the lab. Turbo pump, or more exactingly turbomolecular pump, systems are ''throughput'' pumping systems, which means that the gases that are removed from the evacuated space are continuously discharged into the atmosphere. Turbo pumps cannot discharge to atmospheric pressure and require a roughing pump to interface between the turbo's discharge port and atmosphere. In our lab, this roughing pump is typically an oil-sealed, rotary-vane vacuum pump but may sometimes be an oil-free, dry scroll pump.		The Turbo-Pump Based Vacuum Station is a system used to produce high vacuum ( 10<sup>-6</sup> < X < 10<sup>-9</sup> Torr ) in beamlines and experimental chambers through out the lab. Turbo pump, or more exactingly turbomolecular pump, systems are ''throughput'' pumping systems, which means that the gases that are removed from the evacuated space are continuously discharged into the atmosphere. Turbo pumps cannot discharge to atmospheric pressure and require a roughing pump to interface between the turbo's discharge port and atmosphere. In our lab, this roughing pump is typically an oil-sealed, rotary-vane vacuum pump but may sometimes be an oil-free, dry scroll pump.

Pbarber: /* Maintenance */

2026-02-09T14:07:25Z

Maintenance

← Older revision		Revision as of 10:07, 9 February 2026
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	Maintenance actions involving cryopumps almost always involve thermal cycling and therefore can involve prolonged periods of time. It is not uncommon to lose the better part of a day of data collection due to a cryopump issue.		Maintenance actions involving cryopumps almost always involve thermal cycling and therefore can involve prolonged periods of time. It is not uncommon to lose the better part of a day of data collection due to a cryopump issue.

			{{ Warning \| Since the addition of the Tritium Source, Tandem Accelerator Cryopump maintenance procedures have been altered to allow for the possibility of tritium accumulation in the pump. Maintenance should only be performed by qualified personnel in consultation with the Tritium Source team. As of this writing, the procedures are in flux and thus can not be delineated here. The following information applies in general to a cryopump w/o the possibility of contamination and remain here now for educational purposes only. }}
	Common cryopump maintenance actions include:		Common cryopump maintenance actions include:
	#'''Regeneration'''. This is the process of ridding the pump of the captured gas. Regeneration is needed when the pump reaches capacity or develops a cold short--an ice bridge between the interior cryopanels and exterior housing which prevents the pump from achieving it's operating temperature. Regeneration requires thermal cycling. Typically regeneration is performed by staff during normal business hours. All other maintenance actions will require regeneration as part of the maintenance action. The following procedure for regeneration is provided in case those unfamiliar with the process are required to perform it to restore operations.		#'''Regeneration'''. This is the process of ridding the pump of the captured gas. Regeneration is needed when the pump reaches capacity or develops a cold short--an ice bridge between the interior cryopanels and exterior housing which prevents the pump from achieving it's operating temperature. Regeneration requires thermal cycling. Typically regeneration is performed by staff during normal business hours. All other maintenance actions will require regeneration as part of the maintenance action. The following procedure for regeneration is provided in case those unfamiliar with the process are required to perform it to restore operations.

Pbarber: /* Operation */

2026-02-09T14:03:07Z

Operation

← Older revision		Revision as of 10:03, 9 February 2026
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	*When warming, cryopumps can overpressure. All cryopumps have a pressure relief device of some kind, typically a spring-loaded, elastomer-sealed valve.		*When warming, cryopumps can overpressure. All cryopumps have a pressure relief device of some kind, typically a spring-loaded, elastomer-sealed valve.
	{{ Warning \| The LE Tandem, HE Tandem, and TR1 Analyzing Magnet cryopump pressure relief valves have been modified with a relief valve capture device. This device encases the relief valve and directs any gas from it through a red polyethylene tube to the Tritium Source fume hood. DO NOT alter, modify, or otherwise disturb this system without speaking to the Tritium Source team. }}		{{ Warning \| The LE Tandem, HE Tandem, and TR1 Analyzing Magnet cryopump pressure relief valves have been modified with a relief valve capture device. This device encases the relief valve and directs any gas from it through a red polyethylene tube to the Tritium Source fume hood. DO NOT alter, modify, or otherwise disturb this system without speaking to the Tritium Source team. }}

	Cryopumps designed for ultra-high vacuum systems may also have a single-use burst disk which ruptures violently when actuated. (none of our cryopumps have burst disks)		Cryopumps designed for ultra-high vacuum systems may also have a single-use burst disk which ruptures violently when actuated. (none of our cryopumps have burst disks)
	*When warming, the external cryopanel housing can become so cold that it condenses water vapor and can create a drip hazard for equipment located below it.		*When warming, the external cryopanel housing can become so cold that it condenses water vapor and can create a drip hazard for equipment located below it.

Pbarber: /* Operation */

2026-02-09T14:02:15Z

Operation

← Older revision		Revision as of 10:02, 9 February 2026
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	'''CAUTIONS'''		'''CAUTIONS'''
	*Opening the cryopump when the chamber pressure is too high can cause the cryopump to "crash" or warm up beyond recovery.		*Opening the cryopump when the chamber pressure is too high can cause the cryopump to "crash" or warm up beyond recovery.
	*When warming, cryopumps can overpressure. All cryopumps have a pressure relief device of some kind, typically a spring-loaded, elastomer-sealed valve. Cryopumps designed for ultra-high vacuum systems may also have a single-use burst disk which ruptures violently when actuated. (none of our cryopumps have burst disks)		*When warming, cryopumps can overpressure. All cryopumps have a pressure relief device of some kind, typically a spring-loaded, elastomer-sealed valve.
			{{ Warning \| The LE Tandem, HE Tandem, and TR1 Analyzing Magnet cryopump pressure relief valves have been modified with a relief valve capture device. This device encases the relief valve and directs any gas from it through a red polyethylene tube to the Tritium Source fume hood. DO NOT alter, modify, or otherwise disturb this system without speaking to the Tritium Source team. }}

			Cryopumps designed for ultra-high vacuum systems may also have a single-use burst disk which ruptures violently when actuated. (none of our cryopumps have burst disks)
	*When warming, the external cryopanel housing can become so cold that it condenses water vapor and can create a drip hazard for equipment located below it.		*When warming, the external cryopanel housing can become so cold that it condenses water vapor and can create a drip hazard for equipment located below it.

Pbarber: /* Standard Laboratory Vacuum System Stations */

2024-10-16T15:41:11Z

Standard Laboratory Vacuum System Stations

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 * A source of water cooling.
 * Various interconnecting vacuum hoses and fittings.
 = Contact =
 Powell Barber mailto:pbarber@fsu.edu

Pbarber: Pbarber moved page Vacuum Systems to Standard Laboratory Vacuum System Stations without leaving a redirect: Restructuring subject matter pages.

2023-05-31T13:37:18Z

Pbarber moved page Vacuum Systems to Standard Laboratory Vacuum System Stations without leaving a redirect: Restructuring subject matter pages.

← Older revision

Revision as of 09:37, 31 May 2023

Pbarber: /* Diffusion Pump Based Stations (rare) */

2023-05-30T20:27:55Z

Diffusion Pump Based Stations (rare)

← Older revision		Revision as of 16:27, 30 May 2023
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	=== Diffusion Pump Based Stations (rare) ===		=== Diffusion Pump Based Stations (rare) ===

	The Diffusion Pump Based Vacuum Station is a system used to produce high vacuum (10<sup>-6</sup> < X < 10<sup>-9</sup> Torr ) in some specialized systems within the laboratory, notably the SNICS source and one of the target lab evaporators. Diffusion pumps, in general, are being replaced by more modern alternatives and are typically no longer included in new designs. Feel free to skip this section if you're short on time. ~~Cryopump~~ systems are ''throughput'' systems, which means that the gases that are removed from the evacuated space are continuously discharged into the atmosphere. Diffusion pumps cannot discharge to atmospheric pressure and require a roughing pump to interface between the diffusion pump's discharge port and atmosphere. In our lab, this roughing pump is an oil-sealed, rotary-vane vacuum pump.		The Diffusion Pump Based Vacuum Station is a system used to produce high vacuum (10<sup>-6</sup> < X < 10<sup>-9</sup> Torr ) in some specialized systems within the laboratory, notably the SNICS source and one of the target lab evaporators. Diffusion pumps, in general, are being replaced by more modern alternatives and are typically no longer included in new designs. Feel free to skip this section if you're short on time. Diffusion pump systems are ''throughput'' systems, which means that the gases that are removed from the evacuated space are continuously discharged into the atmosphere. Diffusion pumps cannot discharge to atmospheric pressure and require a roughing pump to interface between the diffusion pump's discharge port and atmosphere. In our lab, this roughing pump is an oil-sealed, rotary-vane vacuum pump.

	The standard diffusion pump station consists of the following components:		The standard diffusion pump station consists of the following components:

Pbarber at 13:26, 21 October 2022

2022-10-21T13:26:49Z

← Older revision		Revision as of 09:26, 21 October 2022
Line 1:		Line 1:
	== Standard Laboratory Vacuum System Stations ==		== Standard Laboratory Vacuum System Stations ==
			=== Introduction ===
			In order to achieve high vacuum (nominally ~ 1 x 10E-6 Torr) it is necessary to combine various vacuum technology components into a system, sometimes colloquially referred to as a "stack." Throughout our lab, there are vacuum stations that are used to achieve high vacuum in different sections of the accelerator. Typically, anywhere the beamlines or accelerator can be separated by isolation valves, a station exists between those valves. It is undesirable to have a "dead section" of beamline - a section that is isolated by valves but without a vacuum station. This page explains the basic stacks or systems in used at each station throughout our lab.
	=== Turbo-Pump Based Stations ===		=== Turbo-Pump Based Stations ===
	The Turbo-Pump Based Vacuum Station is a system used to produce high vacuum ( 10<sup>-6</sup> < X < 10<sup>-9</sup> Torr ) in beamlines and experimental chambers through out the lab. Turbo pump, or more exactingly turbomolecular pump, systems are ''throughput'' pumping systems, which means that the gases that are removed from the evacuated space are continuously discharged into the atmosphere. Turbo pumps cannot discharge to atmospheric pressure and require a roughing pump to interface between the turbo's discharge port and atmosphere. In our lab, this roughing pump is typically an oil-sealed, rotary-vane vacuum pump but may sometimes be an oil-free, dry scroll pump.		The Turbo-Pump Based Vacuum Station is a system used to produce high vacuum ( 10<sup>-6</sup> < X < 10<sup>-9</sup> Torr ) in beamlines and experimental chambers through out the lab. Turbo pump, or more exactingly turbomolecular pump, systems are ''throughput'' pumping systems, which means that the gases that are removed from the evacuated space are continuously discharged into the atmosphere. Turbo pumps cannot discharge to atmospheric pressure and require a roughing pump to interface between the turbo's discharge port and atmosphere. In our lab, this roughing pump is typically an oil-sealed, rotary-vane vacuum pump but may sometimes be an oil-free, dry scroll pump.