USA flag logo/image

An Official Website of the United States Government

High-Resolution and Frequency, Printed Miniature Magnetic Probes

Award Information

Department of Energy
Award ID:
Program Year/Program:
2013 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
28 d
Solicitation Number:
Small Business Information
Eagle Harbor Technologies, Inc.
119 West Denny Way Suite 210 Seattle, WA 98119-4205
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2013
Title: High-Resolution and Frequency, Printed Miniature Magnetic Probes
Agency: DOE
Contract: DE-FG02-13ER90522
Award Amount: $149,996.00


In modern fusion concepts, inductive pickup loops are one of the primary magnetic diagnostics in tokamaks and small-scale concept exploration experiments. They are used in industries and laboratories that utilize and study low-temperature plasmas. Inductive pickup loops are capable of extremely high bandwidths, allowing for the measurements of both high frequency magnetic perturbations (requires microsecond type resolution) as well as slower field profiles associated with the more steady confinement fields (requires second type resolution). Even the most sophisticated fusion devices employ inductive pick up loops, with multiple versions planned for measurements in long-pulse burning plasma devices and experiments such as ITER. In theory, all of these probes are simple in their basic concept and construction; however, complexities arise during implementation that makes careful design important for precision measurements and probe longevity. For example, the Redmond Plasma Physics Laboratory invested more than $1 million and four man years to construct a 96 channel probe. Eagle Harbor Technologies, Inc. (EHT) is developing a technique to significantly reduce the cost and development time of producing magnetic field diagnostics. EHT is designing probes that can be printed on flexible PCBs thereby allowing for extremely small coils to be produced while essentially eliminating the time to wind the coils. The coil size can be extremely small when coupled with the EHT Hybrid Integrator, which is capable of high bandwidth measurements over short and long pulse durations. This integrator is currently being commercialized with the support of a DOE SBIR. Additionally, the flexible PCBs allow probes to be attached to complex surface and/or probes that have a complex 3D structure to be designed and fabricated. During the Phase I, EHT will design and construct magnetic field probes on flexible PCBs, which will be tested at the University of Washingtons HIT-SI experiment and in EHTs material science plasma reactor. Commercial Applications and Other Benefits: There are a large number of scientific and industrial applications that could benefit from the production of magnetic field probes printed on flexible PCBs. The small-scale concept exploration experiments routinely use inductive pickup loops both as internal probes and as surface probes. As new experiments are built or existing ones upgraded, flexible magnetic field probes can be used to make more complex internal and surface probes. ITER, a large tokamak under construction, will utilize about 2000 channels of magnetic field probes. Additionally, the flexible printed probes could be used anywhere a time varying magnetic field is measured, including medical devices, geophysical sensors, and aerospace applications.

Principal Investigator:

Kenneth Miller

Business Contact:

Timothy Ziemba
Small Business Information at Submission:

Eagle Harbor Technologies, Inc.
119 West Denny Way Suite 210 Seattle, WA 98119-4205

EIN/Tax ID: 204848242
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No