The elementary filter of the HBAR type includes two resonators of the HBAR type which are each formed by a transducer and a substrate which are coupled in a suitable manner by electroacoustic waves. The method includes providing a command to the memory device that specifies a calibration mode and, during the calibration mode, driving a voltage level onto the first signal line using a first output driver. If radiation is received from a ghost particle, not each of the at least two detector signals has a level above a predetermined threshold level, whereas radiation received from a particle results in the signals having substantially a same level above a threshold level. The transaction is executed and performance measurements for the transactions are collected and sent to a storage device. A retaining device is also provided so that the sliding tube can slide in a transverse channel of retaining device, thereby adjusting length of the sliding tube.