Slashdot Mirror


Yoctonewton Detector Smashes Force Sensing Record

KentuckyFC writes "A team of physicists has measured the smallest force ever recorded, at 174 yoctonewtons (yocto=10^-24), beating the previous best by three orders of magnitude. Their measurement device consists of a few dozen beryllium ions trapped in magnetic and electric fields using a device called a Penning trap. These ions vibrate at between a few mega and kilohertz, frequencies that can be accurately measured by bouncing laser light off the ions and measuring any Doppler shift they cause. Being charged, the ions are highly susceptible to the tiny forces associated with stray magnetic and electric fields, which change the frequency at which the ions vibrate. Hence the super-sensitive measurements. They team says that straightforward modifications should allow them to measure single yoctonewtons in the near future. This sudden leap in sensitivity could cause a problem for the system of SI prefixes, which don't yet come any smaller than yocto."

4 of 214 comments (clear)

  1. Re:Huh? by thedonger · · Score: 5, Funny

    Who hasn't hearsd of Scientific Notation?

    I haven't hearsd of it.

    --
    Help fight poverty: Punch a poor person.
  2. Re:SI Issue by Anonymous Coward · · Score: 5, Funny

    Simple. Call them deciyoctos, centiyoctos, miliyoctos, microyoctos, etc. The problem will be solved forever. It's not like we will find anything smaller.

    On Slashdot you never can be sure if you are reading a joke from a genius or a line from an idiot.

  3. Low mass gravity measurements by forand · · Score: 5, Interesting

    Haven't had time to read the article but it would amazing if force measurements at these levels could be conducted between well characterized masses to validate general relativity at low mass short distance scales.

  4. beyond yocto by migloo · · Score: 5, Informative

    Logically, 10^-27 would be called xennea
    The recurrence is:
    zepta (Z + hepta=7)
    yocto (Y + okto=8)
    xennea(X + ennea=9)