Dr. Omar Hadjar Profile

Dr. Omar Hadjar

Research Scientist at OI Analytical

SPIE Involvement:

Author

Area of Expertise:

mass spectrometers , ion-electron trajectory simulation , electron energy analyzers , charged particle detectors , ion sources , 3D ion-electron imaging

Websites:

Personal Website

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 | 8 May 2012 Paper

Pixelated-anode for direct MCP readout in imaging applications

Omar Hadjar

Proceedings Volume 8373, 83732X (2012) https://doi.org/10.1117/12.923282

KEYWORDS: Microchannel plates, Electrons, Ions, Sensors, Spectroscopy, Imaging systems, Mass spectrometry, Physics, Magnetism, Phosphorus

Read Abstract +

The novel IonCCD^TM, a charged-particle-sensitive pixelated detector, was used as an anode to directly read out the electrons exiting from the back of a micro-channel plate (MCP). The IonCCD chip is a 51-mm-long linear array of 2126 pixels, each of 21-μm width and 1.5-mm height, resulting in a 24-μm pitch. Both simulations and experiments were performed to assess MCP-IonCCD performance. The assembled MCP-IonCCD test apparatus consisted of a standard, off-the-shelf, 25-mm-diameter circular MCP. The IonCCD was mounted at proximity focus. The IonCCD eliminates the requirement for a phosphorus screen (after glow and electrons-to-photons conversion), as well as the need for a transformer lens or fiber coupling, as commonly used in imaging devices such as electro-optical ion detector systems (EOIDs). Another advantage is the elimination of the rather high voltages (~5-kV) that are typically needed for effective electron-to-photon conversion. Finally, the IonCCD should preclude any photon-scattering-induced spatial resolution degradation. Our early MCP-IonCCD tests showed that the MCP permits an immediate 10³-10⁴ gain, with virtually no additional noise beyond that attributed to the IonCCD alone. The high gain allows the use of lower IonCCD integration times, which will motivate the development of faster IonCCD readout speeds (currently at 2.7 ms) to match the 2-kHz 1D chip. The presented detector system exhibits a clear potential not only as a trace analysis detector in scan-free mass spectrometry, ion mobility and electron spectroscopy but more importantly as a means to achieve simpler, more compact and robust 2D imaging detectors for photon and particle imaging applications.

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