[Doc Ewen looks into the horn antenna, 1950]
Image courtesy of Doc Ewen

Introduction

Harvard Cyclotron: 1948-1951


Detection of HI Line: 1951

Harvard 24ft and 60ft and NRAO founding: 1952-1956

1950s and 1960s: Two Roads that Crossed

Microwave & Millimeter Wave Applications in the 1970s and 1980s

Mm Wave Radiometry in the 1990s

May 2001 visit to NRAO Green Bank

Bibliography

Permissions


[Doc Ewen and horn antenna, 2001]
Image courtesy of Doc Ewen

Doc Ewen: The Horn, HI, and Other Events in US Radio Astronomy

by Doc Ewen, © 2003

Slides 11-16: Harvard Cyclotron, 1948 to 1951

[Schematic of cyclotron Dee circuit]

Schematic of cyclotron Dee circuit


[Half scale model of Dee and cavity with one tank face open]

Half scale model of Dee and cavity with one tank face open.


[Oscillator cabinet is used as the Dee dolly]

Oscillator cabinet is used as the Dee dolly.


[Parts of the rotating condensor]

Parts of the rotating condensor.


[Rotating condensor assembly configuration]

Rotating condensor assembly configuration.


[Stator of rotating condensor on the end of its stub]

Stator of rotating condensor on the end of its stub.

Slide 17
Modified on Sunday, 25-Jul-2004 17:20:05 EDT by Ellen Bouton