Bitter electromagnet
![Diamagnetic forces acting upon the water within its body levitating a live frog inside the 3.2 cm vertical bore of a Bitter solenoid at the Nijmegen High Field Magnet Laboratory, Nijmegen, Netherlands. The magnetic field was about 16 teslas. Video is available.](/Images/godic/202412/24/Frog_diamagnetic_levitation4128.jpg")
![Plate from a 16 T Bitter magnet, 40 cm diameter, made of copper. In operation it carries a current of 20 kiloamperes](/Images/godic/202412/24/Bitter_electromagnet_disk4128.jpg")
![The most powerful electromagnet in the world, the 45 T hybrid Bitter-superconducting magnet at the US National High Magnetic Field Laboratory, Tallahassee, Florida, USA](/Images/godic/202412/24/Small_small_IMG_08364129.jpg")
A Bitter electromagnet or Bitter solenoid is a type of electromagnet invented in 1933 by American physicist Francis Bitter used in scientific research to create extremely strong magnetic fields. Bitter electromagnets have been used to achieve the strongest continuous manmade magnetic fields on earth (up to 45 teslas - as of 2011).