page_title: James Sayers (physicist)
section_title: Career
hierarchical_section_title: James Sayers (physicist) / Career
caption_attribution_description: English: Photo of the original Randall and Boot cavity magnetron
context_page_description: Professor James Sayers was an important Northern Irish physicist, who played a crucial role in developing centimetric radar - now used in microwave ovens.
context_section_description: From 1939-43 he conducted research for the Admiralty at the University of Birmingham on centrimetric radar, producing the cavity magnetron. He worked with John Randall and Harry Boot.
  From 1943-5 he was part of a group of British scientists that worked on the Manhattan Project.
  Professor Sayers was President of the Institution of Electronics 1956/57 and Immediate Past-President 1957/58. In 1958 he received the John Price Wetherill Medal for discoveries in Physical Science.
  From 1946-72 he was Professor of Electron Physics at the University of Birmingham.
caption: Cavity magnetron at the Science Museum
exif: {"Image Make": "Panasonic", "Image Model": "DMC-GF1", "Image Orientation": "Horizontal (normal)", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "GIMP 2.6.8", "Image DateTime": "2011:06:22 23:30:40", "Image YCbCrPositioning": "Co-sited", "Image ExifOffset": "420", "Image PrintIM": "[80, 114, 105, 110, 116, 73, 77, 0, 48, 50, 53, 48, 0, 0, 14, 0, 1, 0, 22, 0, ... ]", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail Orientation": "Horizontal (normal)", "Thumbnail XResolution": "180", "Thumbnail YResolution": "180", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "8574", "Thumbnail JPEGInterchangeFormatLength": "4471", "Thumbnail YCbCrPositioning": "Co-sited", "EXIF ExposureTime": "1/30", "EXIF FNumber": "7/2", "EXIF ExposureProgram": "Program Normal", "EXIF ISOSpeedRatings": "125", "EXIF ExifVersion": "0221", "EXIF DateTimeOriginal": "2009:11:19 10:04:34", "EXIF DateTimeDigitized": "2009:11:19 10:04:34", "EXIF ComponentsConfiguration": "YCbCr", "EXIF CompressedBitsPerPixel": "4", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "925/256", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Flash", "EXIF Flash": "Flash fired, auto mode", "EXIF FocalLength": "14", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "3201", "EXIF ExifImageLength": "2271", "Interoperability InteroperabilityIndex": "R98", "Interoperability InteroperabilityVersion": "[48, 49, 48, 48]", "EXIF InteroperabilityOffset": "8426", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF DigitalZoomRatio": "0", "EXIF FocalLengthIn35mmFilm": "28", "EXIF SceneCaptureType": "Standard", "EXIF GainControl": "Low gain up", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Normal"}