|  |  | High density, heavy ionization
                                    medium 
 |  | 
                                
                                  |  |  |  |  |  |  |  | 
                                
                                  |  |  | Very high resolution detector | 
                                
                                  |  |  |  |  | 
                                
                                  |  |  | Continuously sensitive | 
                                
                                  |  |  | Self-triggering or through
                                    prompt scintillation light | 
                                
                                  |  |  | Stable and safe | 
                                
                                  |  |  |  |  | 
                                
                                  |  |  |  |  | 
                                
                                  |  |  | Relatively cheap detector | 
                                
                                  |  |  |  | Liquid
                                      Argon is cheap, it is only “stored” in
                                      the experiment
TPC: # of channels proportional to surface 
 | 
                                
                                  |  | 
                                
                                  |  |  | 
                                
                                  |  |  | Cryogenic temperature | 
                                
                                  |  |  |  |  | 
                                
                                  |  |  | High purity required for long-drift
                                    time | 
                                
                                  |  |  | No signal amplification in
                                    liquid | 
                                
                                  |  | 
                                
                                  |  | 
                                
                                  |  | 
                                
                                  |  | 
                                
                                  |  | 
                                
                                  |  |