Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

BNL Furnace

The Brookhaven National Lab (BNL) Furnace is primarily a vacuum furnace; nevertheless, it can also be reconfigured to run in air or an inert gas. The main disadvantage of running the BNL Furnace in a gas atmosphere is the maximum temperature limitation imposed by its lack of cooling. This system is more robust than the other general use furnace (F-1600C), but has a lower maximum temperature.

BNL Furnace Schematic (49K)

Sample Geometry
Sample Holder Multiple Copper Posts (see below)
Sample Access In Plane 350o
Sample Access Out of Plane +20o
Maximum Sample Diameter 7.6 cm (3.0 inches)
Maximum Sample Height 3.5 cm (8.9 cm)
Furnace Properties
Temperature Range 200 - 600oC
Temperature Sensors K type thermocouples
*Click Here for Sample Mounting Info*

General Description

Sample Preparation

Experiment Planning

    • Sample visibility of 350o in scattering plane, 20o out of plane
    • Irradiative heating via a cylindrical element driven by a high voltage AC power
    • Active Heating/Sample Zone : 6.5 cm diameter x 8.5 cm length
    • Interlocked alarm system for pressure, and temperature
    • Pressure relief valve rated to 10 psi has been installed in the system
    • Sample Temperature Stability: +1oC at 600oC
    • Sample Holders: A user designed (NIST assistance is available) sample holder compatible with our probes is required. There are two possible sample mounts: A �" diameter copper post with either a �-20 female thread or a M4-0.7 male thread; and a copper base designed to fit our single-crystal sample cans. Ventilated (i.e. non-pressure building) crucible-type holders made of niobium or platinum are ideal; however, special sample mounts can be designed. Any sealed sample holder must be tested off-line at the maximum desired temperature before loading into the furnace to ensure that an over-pressure burst will not occur on the beam line.
    • Sample Geometry:
      • Note that the beam center is 152.4 cm (6 inches) above the bottom of the furnace, and the standard mounting post height is 3.5 cm (1 3/8 inches) from the center of the beam.
      • Any Cd masking MUST be done on the outside of the furnace
    • Plan ahead. At a minimum it will take 2 hours for the sample to reach 600oC.
    • Leave time at the end of the experiment to allow the sample cell to cool in order to open the vessel.
    • Design the experiment with proper sample mounting and ultimate sample temperature requirements in mind.
Created November 22, 2017, Updated November 15, 2019