Working Principle
The ion bunch from REXTRAP is slowed down in a pulsed drift cavity in the vertical beamline. After this the bunch is injected into the 9 T magnetic field. Here the ion cloud is trapped in the first Penning trap (for cooling). Its purpose is to cool down the ions with buffer gas. In this trap, it is possible to apply different excitation modes (dipolar, quadrupolar and octupolar). The ions are then transferred to the second Penning trap (in which decays are studied).
When an ion decays, it can escape the decay trap into the spectrometer. The spectrometer consists out of a set of electrodes to create an electrical potential barrier. If the decayed ion's energy is high enough, it will be able to overcome this barrier to be detected at the top of the setup.
Read more about this topic: WITCH Experiment
Famous quotes containing the words working and/or principle:
“What exacerbates the strain in the working class is the absence of money to pay for services they need, economic insecurity, poor daycare, and lack of dignity and boredom in each partner’s job. What exacerbates it in upper-middle class is the instability of paid help and the enormous demands of the career system in which both partners become willing believers. But the tug between traditional and egalitarian models of marriage runs from top to bottom of the class ladder.”
—Arlie Hochschild (20th century)
“Why does philosophy use concepts and why does faith use symbols if both try to express the same ultimate? The answer, of course, is that the relation to the ultimate is not the same in each case. The philosophical relation is in principle a detached description of the basic structure in which the ultimate manifests itself. The relation of faith is in principle an involved expression of concern about the meaning of the ultimate for the faithful.”
—Paul Tillich (1886–1965)