Calorimeter Data

Here are some data obtained using the movable collimator to test the reliability of the Rutherford technique in measuring the beam current incident on the calorimeter foil.  The graph below shows the ratio of total charge as determined from the calorimeter foil to the total charge as determined from the Rutherford scattering technique plotted as a function of stepper motor position.  Note that there is a flat region where the ratio of calorimeter charge to Rutherford charge is close to unity.