Sources

White Phosphorus Temperature Controller

Built to order

Precision gas cooling for the white-phosphorus reservoir. A rack-mounted controller combines a normally-closed mass flow controller with a separate, normally-open high-conductance bypass valve. A cooling tube and thermocouple connect it to the source on the MBE system.

How it worksDiscuss your configuration
White Phosphorus Temperature Controller front-panel design, with touchscreen temperature and cooling display, power switch, interlock indicators, and enable button
Front-panel design.

Precision control, with cooling capacity in reserve

Cooling circuit: normally-closed MFC and normally-open bypass valve inside the rack controller, with cooling tube and thermocouple connections to the source
Cooling arrangement. Select the diagram to enlarge.
  1. Fine temperature control. The thermocouple provides feedback to a smaller-range MFC, which adjusts cooling-gas flow around the white-phosphorus reservoir. The bypass stays closed during precision control.
  2. High-flow cooling. Open the bypass programmatically for collection or additional cooling. This valve is on/off; its open flow is set during installation through regulated supply pressure and the cooling circuit, rather than electronic flow modulation.
  3. Connection to the source. A regulated gas supply connects at a rear compression fitting. A ½-inch clear tube carries gas to the white-zone cooling jacket, outside the phosphorus-containing vacuum space. The red and white zones retain their heater filaments.

Cooling on power loss

The bypass valve defaults open, allowing cooling gas to flow around the closed MFC and into the cooling jacket. This helps cool the white-phosphorus reservoir and reduce unwanted phosphorus release, provided the gas supply remains available.

Temperature stability

Historical design performance: ±0.05°C temperature stability. Performance of the revised MFC-and-bypass configuration remains to be verified.

Communications

Communications and software compatibility

Ethernet and serial interfaces support integration with modern and legacy MBE control software. Supported protocols and interfaces are listed below.

  • Modbus TCPEthernet
  • Modbus RTURS-422 serial
  • EI-BisynchRS-422 serial
  • Molly · AMBER · Nova · Crystal XEcompatible
  • Machine Studioby epiware llc

Configuration requirements

Discuss your white phosphorus temperature controller configuration

Tell us what you need to control and what equipment you already have. An EpiTech engineer will follow up to discuss the configuration, specifications, and quote.

Contact EpiTech: 443-295-3625 · [email protected]

Name *

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