Dr. Jeffrey M. Jennings Profile

Dr. Jeffrey M. Jennings

Lead Mechanical Engineer

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 14 May 2018 Presentation + Paper

Uncooled resistive metal foil bolometers for imaging with radiofrequency magnetic fields

Jeffrey Jennings, Raj Vaidyanathan, Aravinda Kar

Proceedings Volume 10656, 106560F (2018) https://doi.org/10.1117/12.2305042

KEYWORDS: Magnetism, Bolometers, Sensors, Magnetic resonance imaging, Magnetic sensors, Imaging systems, Metals

Read Abstract +

A set of experiments were conducted looking at how characteristics of loop elements in an array affect their detected induced current and subsequent Joule heating when located in a radio frequency magnetic field. These experiments included evaluations of the observed steady state temperature rise versus the radius of the loop, the location of the loop with respect to the RF source, and the effect on steady state temperature rise when other loops were brought into close proximity. Loop elements were then combined into a radially-symmetric, five-element array which was used to create a coarse magnetic image of a simple piece of aluminum sheet. After normalization, the temperature rise versus loop size results showed a direct linear relationship which enabled prediction of the lower element size threshold based on the properties of existing thermosensing layer materials used in other bolometer applications and the typical performance of analog measurement equipment. Offset sample test results show how the RF field varied linearly across a given plane perpendicular to the RF source transmission axis, increasing as the distance between the sample and one side of the Helmholtz coil is reduced. Separation distance test results also reveal the RF magnetic field cancellation effects due to mutual coupling as the separation between closed-loop elements are brought into close proximity. Lastly, the excellent agreement achieved between the captured image and the actual object show promise in creating an imaging system with significant resolution and contrast differentiation.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years