diff --git a/__pycache__/attocube.cpython-39.pyc b/__pycache__/attocube.cpython-39.pyc
index a5fcde0..b569d57 100644
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diff --git a/__pycache__/channels_minimal.cpython-39.pyc b/__pycache__/channels_minimal.cpython-39.pyc
new file mode 100644
index 0000000..4bdaabe
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diff --git a/__pycache__/pp_shutter.cpython-39.pyc b/__pycache__/pp_shutter.cpython-39.pyc
new file mode 100644
index 0000000..1ec00f3
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diff --git a/channels_minimal.py b/channels_minimal.py
index cbc53bb..c0a4c57 100644
--- a/channels_minimal.py
+++ b/channels_minimal.py
@@ -5,12 +5,12 @@
 # BS channels
 
 # TODO: JF settings regarding raw conversion, compression, etc.
-detectors = [
+detectors_min = [
 # "JF16T03V01",
 ]
 
 
 
-channels = []
+channels_min = ["SARFE10-PSSS059:SPECTRUM_Y"]
 
-pvs =  []#pvs_slits + pv_channels + smaract_channels
+pvs_min =  ['SARFE10-PBPG050:PHOTON-ENERGY-PER-PULSE-AVG']#pvs_slits + pv_channels + smaract_channels
diff --git a/cristallina.py b/cristallina.py
index bf0aa22..0380344 100644
--- a/cristallina.py
+++ b/cristallina.py
@@ -23,12 +23,16 @@ from slic.core.scanner import Scanner
 from slic.core.device.simpledevice import SimpleDevice
 
 from slic.devices.general.motor import Motor
+from slic.devices.general.shutter import Shutter
+from slic.devices.xoptics.pulsepicker import PulsePicker
 from slic.utils import devices, Marker, as_shortcut
 from slic.utils import Channels, Config, Elog, Screenshot, PV
 from slic.core.acquisition.fakeacquisition import FakeAcquisition
 
 from channels import detectors, channels, pvs
 from spreadsheet import overview
+from channels_minimal import detectors_min, channels_min, pvs_min
+from pp_shutter import PP_Shutter
 
 # DEVICES
 ## example devices and adjustables
@@ -56,9 +60,11 @@ def test_attenuator():
 
 ## Undulator
 import undulator
-
 undulators = undulator.Undulators()
 
+# Shutter
+shutter = PP_Shutter("SARES30-LTIM01-EVR0:RearUniv0-Ena-SP",name="Cristallina pulse picker shutter")  # Shutter buttton when using the pulse picker
+pulsepicker = PulsePicker("SAROP31-OPPI151","SARES30-LTIM01-EVR0:Pul3", name="Cristallina X-ray pulse picker OPPI151")
 
 ## Slits
 from slic.devices.xoptics import slits
@@ -84,9 +90,9 @@ pgroup = "p20443"    # commissioning Wavefront Sensor August 2022 (active)
 daq = SFAcquisition(
     instrument,
     pgroup,
-    default_channels=channels,
-    default_pvs=pvs,
-    default_detectors=detectors,
+    default_channels=channels_min ,
+    default_pvs=pvs_min,
+    default_detectors=detectors_min,
     rate_multiplicator=1,
 )
 
@@ -96,7 +102,7 @@ daq = SFAcquisition(
 # scan = Scanner(scan_info_dir=f"/sf/{instrument}/data/{pgroup}/res/scan_info", default_acquisitions=[daq], condition=None)
 
 # Run the scan only when gas monitor value larger than 10uJ (and smaller than 2000uJ):
-check_intensity_gas_monitor = PVCondition("SARFE10-PBPG050:PHOTON-ENERGY-PER-PULSE-US", vmin=10, vmax=2000, wait_time=0.5, required_fraction=0.8)
+check_intensity_gas_monitor = PVCondition("SARFE10-PBPG050:PHOTON-ENERGY-PER-PULSE-US", vmin=10, vmax=2000, wait_time=0.5, required_fraction=0.8)   # required fraction defines ammount of data recorded to save the step and move on to the next one
 
 scan = Scanner(default_acquisitions=[daq],condition = check_intensity_gas_monitor)
 gui = GUI(scan, show_goto=True, show_spec=True)
diff --git a/pp_shutter.py b/pp_shutter.py
new file mode 100644
index 0000000..b3e786c
--- /dev/null
+++ b/pp_shutter.py
@@ -0,0 +1,29 @@
+from slic.core.adjustable import PVAdjustable
+from slic.utils import typename
+
+
+class PP_Shutter:
+    """Class for when pulse picker is used as a shutter. Opening and closing is done with turning on and off the event reciever universal output ON and OFF."""
+    def __init__(self, ID,name="X-ray Pulse Picker Shutter"):
+        self.ID = ID
+        self.name = name or ID
+        pvname_setvalue = ID 
+        pvname_readback = ID
+        self._adj = PVAdjustable(pvname_setvalue, pvname_readback, accuracy=0, internal=True)
+
+    def close(self):
+        self._adj.set_target_value(0).wait()
+
+    def open(self):
+        self._adj.set_target_value(1).wait()
+
+    @property
+    def status(self):
+        state = self._adj.get_current_value()
+        if state is None:
+            return "not connected"
+        return "open" if state else "closed"
+
+    def __repr__(self):
+        tn = typename(self)
+        return f"{tn} \"{self.name}\" is {self.status}"