  A new type of Time Projection Chamber (TPC) has been proposed for the upgrade
of the ALICE (A Large Ion Collider Experiment at CERN) so as to cater to the
high luminosity environment expected at the Large Hadron Collider (LHC)
facility in future. This device will rely on the intrinsic ion back flow (IBF)
suppression of Micro-Pattern Gas Detectors (MPGD) based technology in
particular the Gas Electron Multiplier (GEM). GEM is to minimise the space
charge effect in the main drift volume and thus will not require the standard
gating grid and the resulting intrinsic dead time. It will thus be possible to
read all minimum bias Pb--Pb events that the Large Hadron Collider (LHC) will
deliver at the anticipated peak interaction rate of 50 kHz for the high
luminosity heavy-ion era in Run 3. New read-out electronics will send the
continuous data stream to a new online farm at rates up to 1~TByte/s. The new
read-out chambers will consist of stacks of 4 GEM foils combining different
hole pitches. In addition to a low ion back flow ($<$ 1\%) other important
requirements are good energy resolution (better than 12\% (sigma) for $^{55}$Fe
X-rays) and operational stability.
