How would I create a part where the beam touches another part? [closed]

Here's the code, I want to make the "Explosion" part wherever the beam part touches the part it hits. Here's the code:

local tool = script.Parent
local player = game:GetService("Players").LocalPlayer

tool.Equipped:connect(function(mouse)
    print("Tool equipped!")

    mouse.Button1Down:connect(function()
        print("Mouse pressed!")
        local ray = Ray.new(tool.Handle.CFrame.p, (mouse.Hit.p - tool.Handle.CFrame.p).unit * 300)
        local part, position = workspace:FindPartOnRay(ray, player.Character, false, true)

        local beam = Instance.new("Part", workspace)
        beam.BrickColor = BrickColor.Yellow()
        beam.FormFactor = "Custom"
        beam.Material = "Neon"
        beam.Transparency = 0.25
        beam.Anchored = true
        beam.Locked = true
        beam.CanCollide = false



        local distance = (tool.Handle.CFrame.p - position).magnitude
        beam.Size = Vector3.new(.5, .5, distance)
        beam.CFrame = CFrame.new(tool.Handle.CFrame.p, position) * CFrame.new(0, 0, -distance / 2)
        local explosion = Instance.new("Part", workspace)
        explosion.Shape = "Ball"
        explosion.BrickColor = BrickColor.Yellow()
        explosion.Transparency = 0.25
        explosion.Size = Vector3.new(25,25,25)
        explosion.Position = Vector3.new(.5, .5, distance)
        explosion.Anchored = true
        explosion.CanCollide = false
        explosion.Material = "Neon"
        local ex = Instance.new("Explosion")
        ex.Parent = explosion
        ex.Position = Vector3.new(10,10,10)


        game:GetService("Debris"):AddItem(beam, .7)

        if part then
            local humanoid = part.Parent:FindFirstChild("Humanoid")

            if not humanoid then
                humanoid = part.Parent.Parent:FindFirstChild("Humanoid")
            end

            if humanoid then
                humanoid:TakeDamage(30)
            end
            script.Parent.Reload.Disabled = false
            script.Disabled = true

        end
    end)
end)
--script.Parent.Reload.Disabled = false
        --script.Disabled = true