add axial cooling via kill block

lib/system.py

@@ -124,11 +124,11 @@ CONNECTIONS = ConnectionLayout(
     # qinit_green_aom_fm      =  Analog(11, +1.0, delay=0.0),
 
     # probe double pass
-    probe_green_aom         = Digital(0, 11, 1, delay_up=0.0, delay_down=0.0),
-    probe_green_aom_am      =  Analog(5, 0.125, delay=0.0),
-    probe_green_aom_fm      =  Analog(6,  0.02, delay=0.0),
-    probe_green_servo       = Digital(0, 22, 0, delay_up=0.0, delay_down=0.0),
-    probe_green_sh_2        = Digital(1,  0, 0, delay_up=5e-3, delay_down=1.5e-3),
+    probe_green_aom         = Digital(0,  11, 1, delay_up=0.0, delay_down=0.0),
+    probe_green_aom_am      =  Analog(5,  0.125, delay=0.0),
+    probe_green_aom_fm      =  Analog(14, 0.000, delay=0.0),
+    probe_green_servo       = Digital(0,  22, 0, delay_up=0.0, delay_down=0.0),
+    probe_green_sh_2        = Digital(1,   0, 0, delay_up=5e-3, delay_down=1.5e-3),
 
     # moglabs OP AOM #1
     qinit_green_aom_0       = Digital(1,  2, 0, delay_up=0.0, delay_down=0.0),
@@ -147,7 +147,7 @@ CONNECTIONS = ConnectionLayout(
     clock_aom_fm            =  Analog(13, 0.0, delay=0.0),
 
     # tweezer_aod_am      =  Analog(9, +1.19, delay=0.0), # for 7x magnification
-    tweezer_aod_am          =  Analog(9,  +4.465, delay=0.0), # for 4x magnification
+    tweezer_aod_am          =  Analog(9,  +3.931, delay=0.0), # for 4x magnification
     tweezer_aod_switch      = Digital(1,  6, 1, delay_up=25e-9, delay_down=25e-9),
     # tweezer_aod_am      =  Analog(9, +3.795, delay=0.0), # for 2x magnification
     # tweezer_aod_am      =  Analog(9, +2.004, delay=0.0), # for [100, 102.5, 105, 107.5, 110] MHz array (7x mag)
@@ -462,6 +462,18 @@ def PROBE_GREEN_AOM_AM(s: float, warn_only: bool=False) -> float:
     #         raise Exception(f"PROBE_GREEN_AOM_AM: saturation parameter {s:g} too high at frequency {f:g}")
     return v
 
+def PROBE_GREEN_AOM_FM(f: float) -> float:
+    f0 = 80.0
+    order = -1
+    fp = order * f / 2 - f0
+    if abs(fp > 6.0):
+        raise Exception(f"PROBE_GREEN_AOM_FM: frequency {f:g} out of range")
+    # measured on 2023.09.22
+    a = 0.75820
+    b = -0.08133
+    v = (fp - b) / a
+    return v
+
 def AXIAL_GREEN_AOM_AMP_FREQ(f: float) -> float:
     # returns max optical power achievable at `f` in nW
     A = 67.0259184 # last measured 09.13.2022