This invention report on an ion storage device that work efficiently at high pressure (>50 mtorr).This device store and release ion quickly into mass analyzers such as mass spectrometers. To store ions in this device they need to be confined radially as well as axially although radially does not imply circular geometry for the trap body. For example to confine ions radially the body of the trap can be made of stacked-ring electrodes where out-of-phase rf field is applied to adjacent ring-shaped electrodes (prior art, e.g. ion funnel trap). In this device ions, instead, are confined radially utilizing a segmented multipole where out-of-phase rf field is applied to adjacent rods and different dc voltage can be applied to different segments of the same rod. Adjacent segments which are aligned radially have out-of-phase rf field while adjacent segments which are aligned axially have the same rf-field. Segmenting the multipole allow for precise control of the ions velocity as they exit from trap especially at high pressures and for cases where a tightly focused packets of ions are required. In this device adjacent segments can be separated by air or dielectric material. The radius on which the multipole is aligned (inscribed radius) can be constant or changing through the trap. To block ions from exiting the trap during the storage (or accumulation) period ions are also confined axially. Axial confinement in this invention is done through two approaches. The first approach to confine ions axially is through rf confinement. Rf-confinement is done by applying out-of-phase rf field to adjacent set of wires thus creating what we refer to as rf-wall. The wire set can be also biased with a dc potential in addition to the rf-field. Ions are released from the trap by removing the rf-field from the set of wires thus allowing ions to pass through the wires. In the second approach ions are confined axially by creating a potential well through applying appropriate dc potentials to a set of ring electrodes which may be separated by constant distance or variable distances. The combination of the number of electrodes, different spacing between electrodes and the voltage applied to the electrodes create a potential well that confine ions axially.