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    PR # 31026                                                                   
     To differentiate several theories for the relativistic particle accel       
     eration to explain the pulsar activity, we propose observations of fo       
     ur selected  rotation powered pulsars. Two of them has strong polar m       
     agnetic field and  weak light-cylinder field, while the other two (ms       
     ec pulsars) have weak  polar magnetic field but strong light cylinder       
      field. For well-studied young powerful pulsars, both polar and light       
     -cylinder fields are strong. Since  the magnetic field strength is th       
     e most important parameter for the emission  processes, comparison am       
     ong these three classes of pulsars is most powerful  experimental way       
      to diagnose the acceleration mechanism.                                    
                                                                                 
                                                                                 
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